{"title":"Narrowband filters for telescopes","description":"\u003cp\u003eNarrowband filters for telescopes are an essential tool for astrophotographers who want to capture precise details of the deep sky. These filters allow only a very specific range of wavelengths to pass through, corresponding to the specific emissions of hydrogen, oxygen, or sulfur.\u003c\/p\u003e\n\u003cp\u003eBy using narrowband filters, you can isolate the emissions from nebulae and other celestial objects, while blocking stray light and light pollution. This greatly improves contrast and reveals fine structures that are invisible in natural light. Hα, OIII, and SII filters are the most common and can be combined to create Hubble palette (SHO) images, offering spectacular colors and exceptional detail.\u003c\/p\u003e\n\u003cp\u003eWhether you are an advanced amateur or an experienced astrophotographer, narrowband filters for telescopes optimize your acquisitions by enabling accurate tracking and high-quality long exposures. \u003c\/p\u003e\n\u003cp\u003eExplore our selection of narrowband filters to get the most out of your astrophotography sessions and reveal the hidden beauty of nebulae and the deep sky. Discover other types of \u003ca href=\"https:\/\/istronomyplus.com\/collections\/filters\" target=\"_self\" title=\"\"\u003etelescope filters\u003c\/a\u003e such as our \u003ca href=\"https:\/\/istronomyplus.com\/collections\/narrowband-filters\" target=\"_self\" title=\"\"\u003emultiband and broadband filters\u003c\/a\u003e, \u003ca href=\"https:\/\/istronomyplus.com\/collections\/imaging-filters\" target=\"_self\" title=\"\"\u003eimaging filters\u003c\/a\u003e, and \u003ca href=\"https:\/\/istronomyplus.com\/collections\/rgb-filters\" target=\"_self\" title=\"\"\u003ecolor filters\u003c\/a\u003e on our website.\u003c\/p\u003e","products":[{"product_id":"chroma-3nm-h-alpha-filter","title":"Chroma 3nm H-Alpha Filter","description":"\u003ch2\u003eChroma 3nm H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 3nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch4\u003eAvailable Sizes\u003c\/h4\u003e\n\u003cp\u003e1.25″ round mounted (27001-1.25″) 2″ round mounted (27001-2″) 31mm round unmounted (27001-31) 36mm round unmounted (27001-36) 50mm round unmounted (27001-50) 50mm x 50mm square unmounted (27001-50S)\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFilter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted (27001-1.25″)","offer_id":43647592693989,"sku":"CHR-27001-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted (27001-2″)","offer_id":43647592726757,"sku":"CHR-27001-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted (27001-31)","offer_id":43647592759525,"sku":"CHR-27001-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted (27001-36)","offer_id":43647592792293,"sku":"CHR-27001-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted (27001-50)","offer_id":43647592825061,"sku":"CHR-27001-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted (27001-50S)","offer_id":43647592890597,"sku":"CHR-27001-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-5nm-h-alpha-filter","title":"Chroma 5nm H-alpha Filter","description":"\u003ch2\u003eChroma 5nm H-alpha Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm).\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma 5nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647835865317,"sku":"CHR-27002-1.25\"","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647835898085,"sku":"CHR-27002-2\"","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647835930853,"sku":"CHR-27002-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647835963621,"sku":"CHR-27002-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647835996389,"sku":"CHR-27002-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647836029157,"sku":"CHR-27002-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-8nm-h-alpha-filter","title":"Chroma 8nm H-alpha Filter","description":"\u003ch2\u003eChroma 8nm H-alpha Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 8nm H-alpha Filter is essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrowband emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647953567973,"sku":"CHR-27003-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647953600741,"sku":"CHR-27003-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647953633509,"sku":"CHR-27003-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647953666277,"sku":"CHR-27003-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647953699045,"sku":"CHR-27003-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50 square unmounted","offer_id":43647953731813,"sku":"CHR-27003-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-h-alpha-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-3nm-h-beta-filter","title":"Chroma 3nm H-Beta Filter","description":"\u003ch2\u003eChroma 3nm H-Beta Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\nThe Chroma 3nm H-beta Filter is also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrowband filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm H-beta Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647747129573,"sku":"CHR-27004-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647747162341,"sku":"CHR-27004-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647747195109,"sku":"CHR-27004-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647747227877,"sku":"CHR-27004-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647747260645,"sku":"CHR-27004-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square unmounted","offer_id":43647747293413,"sku":"CHR-27004-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-beta-filter-astronomy-plus-1.webp?v=1690483351"},{"product_id":"chroma-5nm-h-beta-filter","title":"Chroma 5nm H-Beta Filter","description":"\u003ch2\u003eChroma 5nm H-beta Filter\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-beta filters are also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrow-band filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye\u003c\/li\u003e\n\u003cli\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate\u003cbr\u003ein CWL and band pass adherence\u003c\/li\u003e\n\u003cli\u003eNo reflections leading to image distortions or “back reflections”\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Chroma 5nm H-beta Filter is also useful for imaging nebulae and objects rich in ionized hydrogen. At 486.1nm, a narrowband filter is required to separate H-beta from nearby blue and green spectral lines. Although weaker than the H-alpha line, this is often used for visual detection as the longer red wavelengths of H-alpha are difficult to detect by eye. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm H-beta Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647863095525,"sku":"CHR-27005-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647863128293,"sku":"CHR-27005-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647863161061,"sku":"CHR-27005-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647863193829,"sku":"CHR-27005-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647863226597,"sku":"CHR-27005-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647863259365,"sku":"CHR-27005-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-h-beta-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-3nm-sii-filter","title":"Chroma 3nm SII Filter","description":"\u003ch2\u003eChroma 3nm SII Filter\u003c\/h2\u003e\nThe Chroma 3nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647809159397,"sku":"CHR-27009-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647809192165,"sku":"CHR-27009-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647809224933,"sku":"CHR-27009-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647809257701,"sku":"CHR-27009-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647809290469,"sku":"CHR-27009-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647809323237,"sku":"CHR-27009-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-5nm-sii-filter","title":"Chroma 5nm SII Filter","description":"\u003ch2\u003eChroma 5nm SII Filter\u003c\/h2\u003e\nThe Chroma 5nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eChroma 5nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e\n\u003ch3\u003e\u003c\/h3\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647924306149,"sku":"CHR-27010-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647924338917,"sku":"CHR-27010-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647924371685,"sku":"CHR-27010-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647924404453,"sku":"CHR-27010-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647924437221,"sku":"CHR-27010-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647924469989,"sku":"CHR-27010-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-8nm-sii-filter","title":"Chroma 8nm SII Filter","description":"\u003ch2\u003eChroma 8nm SII Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 8nm SII Filter isolates the spectral emission of singly ionized sulfur atoms, also common in nebulae. Emission is at two lines occurring as a doublet, at 671.6 and 673.1 nm. This filter also separates sulfur emission from H-alpha emission (656.3nm). Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm SII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43648000327909,"sku":"CHR-27011-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43648000360677,"sku":"CHR-27011-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43648000393445,"sku":"CHR-27011-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43648000426213,"sku":"CHR-27011-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43648000458981,"sku":"CHR-27011-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43648000491749,"sku":"CHR-27011-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-sii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-3nm-oiii-filter","title":"Chroma 3nm OIII Filter","description":"\u003ch2\u003eChroma 3nm OIII Filter\u003c\/h2\u003e\nThe Chroma 3nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647786189029,"sku":"CHR-27006-1.25","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647786221797,"sku":"CHR-27006-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647786254565,"sku":"CHR-27006-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647786287333,"sku":"CHR-27006-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647786320101,"sku":"CHR-27006-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647786352869,"sku":"CHR-27006-50S","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-oiii-filter-astronomy-plus-1.webp?v=1690483357"},{"product_id":"chroma-5nm-oiii-filter","title":"Chroma 5nm OIII Filter","description":"\u003ch2\u003eChroma 5nm OIII Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma 5nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eDurable sputter coatings\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: \u0026lt;30 arcsec\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 3.0 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 5nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647896256741,"sku":"CHR-27007-1.25","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647896289509,"sku":"CHR-27007-2","price":1365.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647896322277,"sku":"CHR-27007-31","price":644.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647896355045,"sku":"CHR-27007-36","price":868.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647896387813,"sku":"CHR-27007-50","price":1295.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted","offer_id":43647896453349,"sku":"CHR-27007-50S","price":1932.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-5nm-oiii-filter-astronomy-plus-1.webp?v=1690483363"},{"product_id":"chroma-8nm-oiii-filter","title":"Chroma 8nm OIII Filter","description":"\u003ch2\u003eChroma 8nm OIII Filter\u003c\/h2\u003e\nThe Chroma 8nm OIII Filter isolates the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. Chroma Technology is an employee-owned company. They specialize in the design and manufacture of sputtered optical filters and coatings for applications that require the greatest precision in color separation, optical quality and signal purity. Their astronomical filters are used worldwide in research and amateur applications. They are as comfortable designing and manufacturing custom filters as they are for their catalog items. Highly precise and accurate, the passbands of these filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with apertures of f\/4 or smaller. Chroma provides custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. They also can provide larger sizes and unique passbands upon request. Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. All filters are manufactured in Vermont.\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specifications\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable sputter coatings\u003cbr\u003eParallelism: \u0026lt;30 arcsec\u003cbr\u003eThickness: 3.0 +\/-0.05mm\u003cbr\u003eFilters designed for use with CCD and for f\/4.0 or slower\u003cbr\u003eTransmitted wavefront better than 0.25 waves\/inch\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 8nm OIII Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\" target=\"_blank\" data-mce-href=\"https:\/\/www.chroma.com\/sites\/default\/files\/Astronomy-Brochure-2022.pdf\"\u003eChroma Astronomy Filters \u0026amp; Sets Brochure\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLifetime Warranty for Sputtered Catalog Filters\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43647980536037,"sku":"CHR-27008-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43647980568805,"sku":"CHR-27008-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43647980601573,"sku":"CHR-27008-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43647980667109,"sku":"CHR-27008-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43647980699877,"sku":"CHR-27008-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50x50 square unmounted","offer_id":43647980732645,"sku":"CHR-27008-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-8nm-oiii-filter-astronomy-plus-1.webp?v=1690483363"},{"product_id":"astronomik-oiii-visual-filter","title":"Astronomik OIII Visual Filter","description":"\u003ch2\u003eAstronomik OIII Visual Filter\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFrom the start, the Astronomik OIII Visual Filter has been very specifically designed for the visual observation of gaseous and planetary nebulae. The extremely narrow pass band of the two OIII lines brings a substantial contrast gain to these lines even under best observation conditions. On faint super nova remnants and faint planetary nebulae the Astronomik OIIIfilter will often make the difference as to whether the object can bee seen or not!\u003c\/strong\u003e The optimal aperture ratio for the use of the filter is 1:3 to 1:15 with apertures of more than 6\" (150mm). Transmission losses and chromatic distortions, which arise with other filters, occur with Astronomik OIII filters only when extremely bright aperture ratios of 1:3 and more come into play. The Astronomik OIII filters thus can expand the view of dispersed objects, generally speaking, to the whole visual field of view of the eyepiece and are not limited to only the center of the eyepiece.\u003c\/p\u003e\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\u003cp\u003eSince enough light must be available to make use of the OIII filter it is best to use this filter with apertures of more than 6\" (150mm). Smaller instruments do not gather enough light for meaningful and satisfying astronomical work. However, please note: Many experienced Deep Sky observers, with apertures of more than 10\" (250mm), prefer using the OIII filter instead of the more versatile UHC filter. Due to the high optical quality of the Astronomik OIII filter substrate you will see the same needle-sharp stars as you would from your regular telescope. [caption id=\"attachment_3936\" align=\"aligncenter\" width=\"592\"]\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli\u003eFilm photography: It depends, very long exposure time\u003c\/li\u003e\n\u003cli\u003eCCD photography: Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Very good, huge contrast enhancement at O III-emission nebulas\u003c\/li\u003e\n\u003cli\u003eDSLR photography (MC modified): Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Reasonable, if light pollution is a big problem and OIII Objects are beeing observed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik_oiii_trans_480x480.png?v=1687450098\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan style=\"color: #ff8000;\"\u003eThe major emission lines of artifical light pollution: | Hg 435,8nm | Hg 546,1nm | Hg 577,0nm | Hg 578,1nm | | Na 589,0nm | Na 589,6nm | Na 615,4nm | Na 616,1nm |\u003c\/span\u003e \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan style=\"color: #20a652;\"\u003eThe major emission lines of nebulas: H-β 486,1nm | OIII 495,9nm | OIII 500,7nm | H-α 656,3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eHow to Read the Chart\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cb\u003ehorizontal axis\u003c\/b\u003e is the \u003cb\u003eWavelength in Nanometers\u003c\/b\u003e (nm). 400nm is deep blue, at 520nm the human eye senses green and at 600nm red. At 656nm is the famous “H-Alpha” emission line of hydrogen.\u003c\/li\u003e\n\u003cli\u003eThe \u003cb\u003etransmission in %\u003c\/b\u003e is plotted on the \u003cb\u003evertical axis\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli\u003eThe red line shows the \u003cb\u003etransmission of the filter\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVisual filters\u003c\/b\u003e: The \u003cb\u003egrey\u003c\/b\u003e line in the background shows the relative sensitivity of the human eye at night. The maximum is at ~510nm and drops to longer and shorter wavelengths. You can easily see, that you can´t see anything of the H-alpha line at night (even if you can during daylight!) The sensitivity at 656nm is 0% at night!\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePhotographic filters\u003c\/b\u003e: The grey line in the background shows the sensitivity of a typical CCD sensor.\u003c\/li\u003e\n\u003cli\u003eThe most important \u003cb\u003eartifical emission\u003c\/b\u003e lines are shown in orange. The artifical light pollution is dominated by see mercury (Hg) and sodium (Na), which are used in nearly all streetlights.\u003c\/li\u003e\n\u003cli\u003eThe most important \u003cb\u003eemission lines from nebulas\u003c\/b\u003e are shown in green. The most important lines are from ionized Hydrogen (H-alpha and H-beta) and double ionized oxygen (OIII).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003etyp. 95% transmission at 496nm (OIII)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003etyp. 95% transmission at 501nm (OIII)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eComplete blocking of all disturbing wavelength coverages\u003c\/li\u003e\n\u003cli\u003eThe ideal filter for telescopes 10 \" (25cm) and larger\u003c\/li\u003e\n\u003cli\u003eMain operational use: Planetary nebulas \u0026amp; super nova remnants\u003c\/li\u003e\n\u003cli\u003eNo moisture-sensitivity, no aging, and totally scratch-proof\u003c\/li\u003e\n\u003cli\u003eExcellent carrier material - substrate is optically polished. The optical performance (resolution \u0026amp; contrast) of your telescope is not reduced in any way by the filter.\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eFilter and filter case\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/astronomik-warranty\" target=\"_blank\"\u003eAstronomik 10-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":44116153204965,"sku":"AK-8h0006","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (M48)","offer_id":44116153237733,"sku":"AK-8h0045","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"SC Rear Cell (2'' \/ 24TPI)","offer_id":44116153270501,"sku":"AK-8h00bk","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"T-Mount (M42 x 0.75)","offer_id":44127359631589,"sku":"AK-8h00bj","price":271.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik-oiii-visual-filter-astronomy-plus-1.jpg?v=1690483935"},{"product_id":"tele-vue-bandmate-oiii-filter","title":"Tele Vue Bandmate OIII Filter","description":"\u003ch1\u003eTele Vue Bandmate OIII Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Tele Vue Bandmate OIII Filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.It’s available in 1.25″ or 2″ mounted format.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eBackground\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_1\" role=\"tabpanel\" id=\"tab-local_1\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv aria-labelledby=\"tab-title-local_2\" role=\"tabpanel\" id=\"tab-local_2\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eBandmate OIII Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" mounted","offer_id":43732876886245,"sku":"TV-B2O-0125","price":200.0,"currency_code":"CAD","in_stock":true},{"title":"2\" mounted","offer_id":43732876919013,"sku":"TV-B2O-0200","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-oiii-filter-astronomy-plus-1_42c420ce-60a1-4111-9ba4-4961cda1ab62.png?v=1690484214"},{"product_id":"tele-vue-bandmate-h-beta-filter","title":"Tele Vue Bandmate H-Beta Filter","description":"\u003ch2\u003eTele Vue Bandmate H-Beta Filter\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Tele Vue Bandmate H-Beta Filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces. It’s available in 1.25″ or 2″ mounted format.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eBackground\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan\u003eBandmate H-Beta Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" Mounted","offer_id":43732847362277,"sku":"TV-B2H-0125","price":200.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43732847395045,"sku":"TV-B2H-0200","price":364.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-h-beta-filter-astronomy-plus-1_e69b3cd0-06a4-4c9c-8edf-444b2f559993.png?v=1690484214"},{"product_id":"zwo-h-alpha-oiii-sii-7nm-narrowband-sho-filter-set","title":"ZWO 7nm Narrowband SHO Filters (Ha, OIII \u0026 SII)","description":"\u003ch2\u003eZWO 7nm SHO Narrowband Filters (Ha, OIII \u0026amp; SII)\u003c\/h2\u003e\n\u003cp\u003eThe ZWO SHO Narrowband Filter Set contains one H-alpha, one OIII and one SII filter. Use it for tricolor CCD astrophotography. Available in 1.25″ \u0026amp; 2″ round mounted sizes as well as 31mm \u0026amp; 36mm round unmounted sizes.\u003c\/p\u003e\n\u003cp\u003eThe ZWO H-alpha 7nm Narrowband Filter has a bandpass of  7nm and passes light at 656nm  wavelength, light transmission rate comes up to 90%. Best choice of narrowband H-alpha astrophotography filter for high-contrast imaging and revealing rich details of the nebula even in areas with strong light pollution, just prepare to experience the infinite fun with it!\u003c\/p\u003e\n\u003cp\u003eThe ZWO OIII 7nm Narrowband Filter is designed for nebula observation allowing the 7nm bandwidth of light centered on a wavelength of 500nm through,  which corresponds to OIII emission lines, blocking out all other light.  Adding the ZWO O-III Narrowband filter to your imaging collection will help you go beyond the RGB imaging and will help capture your favorite nebulas in a totally new light, no matter how polluted your skies may be!\u003c\/p\u003e\n\u003cp\u003eThe ZWO SII 7nm Narrowband Filter passes light at 672nm wavelength with a bandpass of 7nm which is designed for nebula observation. It is suitable for visual observation on most emission nebulae, planetary nebulae and supernova remnants, use it with H-alpha and OIII narrowband filters (SHO Set) for tricolor CCD astrophotography.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter does not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eIt can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0b7561e863701da396bce2092bc696ec.webp?v=1752870758\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003eNew vs Old Filters\u003c\/h4\u003e\n\u003cp\u003eNew Ha filter is based on the new base glass, less reflection( less halo of bright stars).\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003eWe made a test of our Ha Filters (ASI1600 mono camera, single frame, 300s, DDP in MaximDL) :\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/0c2508e6ce1e835958f976b9e417026a.webp?v=1752870720\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eNew OIII filter is based on the same base glass, new coating standard, better block rate of off-band.\u003c\/p\u003e\n\u003cp\u003eNew SII filter is based on the new base glass, less reflection( less halo of bright stars).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7±0.5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\n\u003cp\u003e31mm Round Unmounted\u003c\/p\u003e\n\u003cp\u003e36mm Round Unmounted\u003c\/p\u003e\n\u003cp\u003e2″ Round Mounted\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGlass Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.0+\/-0.03 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePolishing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 wavefront over the both surfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAbout 90% at SII line 672nm\n\u003cp\u003e\u0026lt;0.1% transmission of off-band, OD3(Optical Density)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIR-Cut\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e700-1100nm cut-off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFilter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCase\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ZWO-Narrowband-Filters-Transmission-Curves.pdf?v=1670868994\" target=\"_blank\"\u003eZWO Narrowband Filters Transmission Curves\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Filter Set (SHO) \/ 1.25\" Mounted","offer_id":43760428515557,"sku":"ZWO-NB7nm1.25","price":517.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 31mm Unmounted","offer_id":46386674696421,"sku":"ZWO-NB7nmD31","price":591.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 36mm Unmounted","offer_id":43760428581093,"sku":"ZWO-NB7nmD36","price":671.0,"currency_code":"CAD","in_stock":true},{"title":"Filter Set (SHO) \/ 2\" Mounted","offer_id":43760428613861,"sku":"ZWO-NB7nmD2","price":979.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 1.25\" Mounted","offer_id":43760428646629,"sku":"ZWO-OIII7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 31mm Unmounted","offer_id":46386674729189,"sku":"ZWO-OIII7nmD31","price":207.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 36mm Unmounted","offer_id":43760428712165,"sku":"ZWO-OIII7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 2\" Mounted","offer_id":43760428744933,"sku":"ZWO-OIII7nmD2","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 1.25\" Mounted","offer_id":43760428777701,"sku":"ZWO-Ha7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 31mm Unmounted","offer_id":46386674761957,"sku":"ZWO-Ha7nm31","price":203.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 36mm Unmounted","offer_id":43760428843237,"sku":"ZWO-Ha7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"H-Alpha \/ 2\" Mounted","offer_id":43760428876005,"sku":"ZWO-Ha7nm2","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 1.25\" Mounted","offer_id":43760428908773,"sku":"ZWO-SII7nm1.25","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 31mm Unmounted","offer_id":46386674794725,"sku":"ZWO-SII7nm31","price":207.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 36mm Unmounted","offer_id":43760428974309,"sku":"ZWO-SII7nmD36","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II \/ 2\" Mounted","offer_id":43760429007077,"sku":"ZWO-SII7nm2","price":349.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/zwo-h-alpha-oiii-and-sii-7nm-narrowband-sho-filters-astronomy-plus-1_32f6c439-47b7-4af3-a15f-bedf87b1d1fe.jpg?v=1690484789"},{"product_id":"celestron-2-oxygen-iii-narrowband-filter-93624","title":"Celestron 2\" Oxygen III Narrowband Filter (93624)","description":"\u003ch1\u003eCelestron 2\" Oxygen III Narrowband Filter\u003c\/h1\u003e\n\u003cp\u003eThe 2\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.\u003cbr\u003e\u003cbr\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 2\" OIII narrowband filter isolates the two doubly-ionized oxygen lines (496 and 501 nm lines)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFilter has ultra-hard, vacuum-deposited coating\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEliminates un-natural colored halos surrounding bright stars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron 2\" Oxygen III Narrowband Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":43125763997925,"sku":"CEL-93624","price":100.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-2-oxygen-iii-narrowband-filter-93624-astronomy-plus_0ca55fdd-9f55-429e-942c-1c52a3622404.jpg?v=1690484924"},{"product_id":"celestron-1-25-oxygen-iii-narrowband-filter-93623","title":"Celestron 1.25\" Oxygen III Narrowband Filter (93623)","description":"\u003ch2\u003eCelestron 1.25\" Oxygen III Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eThe 1.25\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.\u003c\/p\u003e\n\u003cp\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 1-1\/4\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCelestron 1.25\" Oxygen III Narrowband Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":43125764030693,"sku":"CEL-93623","price":130.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-1-25-oxygen-iii-narrowband-filter-93623-astronomy-plus-1.webp?v=1690484924"},{"product_id":"optolong-sii-6-5nm-imaging-narrowband-filter","title":"Optolong SII 6.5nm Imaging Narrowband Filter","description":"\u003ch2\u003eOptolong SII 6.5nm Imaging Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both highand low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO kit (H-alpha7nm, OIII 6.5nm and SII6.5nm) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20210703\/3427717cb1f3057669a8ab02ddfd6cd6.png\" width=\"545\" height=\"317\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲ The SII6.5nm filter line is shown in\u003cstrong\u003e\u003cspan style=\"color: #0d5bc9;\"\u003e BLUE.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"597\" height=\"98\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697810374885,"sku":"OL-SII-125","price":222.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697810440421,"sku":"OL-SII-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697810505957,"sku":"OL-SII-31","price":237.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697810571493,"sku":"OL-SII-36","price":264.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-sii-6-5nm-imaging-narrowband-filter-astronomy-plus_7b34aae6-cbca-42bc-af0d-24dbf0fe8090.png?v=1690487282"},{"product_id":"optolong-h-alpha-7nm-narrowband-filter","title":"Optolong H-Alpha 7nm Narrowband Filter","description":"\u003ch2\u003eOptolong H-Alpha 7nm Narrowband Filter\u003c\/h2\u003e\n\u003cp\u003eOptolong improved version of H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain use and performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution.\u003c\/p\u003e\n\u003cp\u003eHubble look of images can be made by the combination of H-alpha, OIII-CCD and SII-CCD, such as the famous “Pillars of Creation” (M16 Eagle Nebula).\u003c\/p\u003e\n\u003cp\u003eNarrowband imaging with SHO set (H-alpha, OIII-CCD and SII-CCD) can be done with the moon up in heavy light pollution, so your equipment is not sitting dormant for several weeks.\u003c\/p\u003e\n\u003cp\u003eH-alpha filter is the first narrowband addition to LRGB set for most imagers who blend a black-and-white Ha image into RGB data to enhance structural detail while maintaining natural look.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/3427717cb1f3057669a8ab02ddfd6cd6.png\" alt=\"\" style=\"float: none;\" width=\"669\" height=\"389\"\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"591\" height=\"97\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43693214466277,"sku":"OL-HA-125","price":222.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43693214499045,"sku":"OL-HA-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"31mm unmounted","offer_id":43693214531813,"sku":"OL-HA-31","price":236.0,"currency_code":"CAD","in_stock":true},{"title":"36mm unmounted","offer_id":43693214564581,"sku":"OL-HA-36","price":264.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C","offer_id":46339847127269,"sku":null,"price":307.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-h-alpha-7nm-narrowband-filter-astronomy-plus_749d0928-f62b-49e9-8873-ff8ec9959bd2.png?v=1690487285"},{"product_id":"optolong-improved-nb-filters-sho-6-5nm-narrowband-filter-kit","title":"Optolong Improved NB Filters SHO 6.5nm Narrowband Filter Kit","description":"\u003ch2\u003eOptolong NB Filters SHO 6.5nm Narrowband Filter Kit\u003c\/h2\u003e\n\u003cp\u003eOptolong SHO6.5nm filter kit includes SII6.5nm, H-Alpha7nm, and OIII6.5nm narrow-band filters, generally working with astronomical monochrome cooling CCD and modified DSLR  imaging in each single-channel . Corresponding with RGB channel (Ha, OIII, SII), photographers can process Hubble images by astronomical post processing software .\u003c\/p\u003e\n\u003cp\u003eExtra narrowband SIICCD 6.5nm filter (Sulful II for CCD) is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/p\u003e\n\u003cp\u003eH-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.\u003c\/p\u003e\n\u003cp\u003eExtra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/p\u003e\n\u003cp\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eGive you higher contrast and greater detailed viewing;\u003c\/p\u003e\n\u003cp\u003eDecrease background noise and improve the contrast of objects;\u003c\/p\u003e\n\u003cp\u003eIncrease the faint nebula signal and make it to be brightness;\u003c\/p\u003e\n\u003cp\u003eWith narrow band filters kit, you are able to process a hubble image;\u003c\/p\u003e\n\u003cp\u003eThrough the optimization of the substrate and upgrading of coating technology, significantly improved the halo around the stars, especially in O3.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/optolong.com\/uploads\/images\/20191119\/37274b18916a7e7d6fc4f9a0a201f11b.jpg\" width=\"485\" height=\"282\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"609\" height=\"100\"\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eOIII \/ H-A \/ SII Filters\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697078304997,"sku":"OL-SHO-1.25","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697078337765,"sku":"OL-SHO-2","price":937.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43697078370533,"sku":"OL-SHO-31","price":685.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43697078403301,"sku":"OL-SHO-36","price":768.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-improved-nb-filters-sho-6-5nm-narrowband-filter-kit-astronomy-plus_ec64c790-0e6e-43af-b2ba-0ce0fdbd3a41.png?v=1690487285"},{"product_id":"optolong-narrowband-h-beta-filter","title":"Optolong Narrowband H-Beta filter","description":"\u003ch2\u003eOptolong Narrowband H-Beta filter\u003c\/h2\u003e\n\u003cp\u003eOpotlong narrowband H-beta filter is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 486nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). H-beta emits 486nm and it is a blue-colored filte.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse with a large aperture telescope under clear and dark viewing conditions with good seeing.\u003c\/p\u003e\n\u003cp\u003eSuitable for viewing on the faint and elusive Horsehead Nebula and California Nebula.\u003c\/p\u003e\n\u003cp\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eSubstrate: Optical glass\u003cbr\u003eThickness: 1.85mm\u003cbr\u003eTave:  T\u0026gt;80%\u003cbr\u003eBlocking range: 400-700nm\u003cbr\u003eBlocking depth: light pollution  line blocking \u0026gt;99%\u003cbr\u003eSurface quality: 60\/40\u003cbr\u003eTransmitted Wavefront RMS: λ\/4\u003cbr\u003eParallelism: 30s\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"381\" width=\"595\" src=\"https:\/\/optolong.com\/uploads\/images\/20201125\/c6985afa5412b452d95c07c7672b85ef.png\" alt=\"\" class=\"lazyloaded\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲The WHITE line shows the transmission of the H-Beta filter. Green line shows the emmission of nebula. The artifical emission lines are shown in ORANGE.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"93\" width=\"567\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" alt=\"\" class=\"lazyloaded\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697732092133,"sku":"OL-HBETA-1.25","price":124.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697732124901,"sku":"OL-HBETA-2","price":194.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-narrowband-h-beta-filter-astronomy-plus_51584a29-5e66-4909-a30c-d5b86d715abd.png?v=1690487288"},{"product_id":"lumicon-2-inch-sct-rear-cell-hydrogen-β-filter-lf3065","title":"Lumicon 2 Inch SCT Rear Cell Hydrogen-β Filter (LF3065)","description":"\u003ch1\u003eLumicon 2 Inch SCT Rear Cell Hydrogen-β Filter\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eFINAL SALE!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"Product-description-6795773116569-6795773116569\" class=\"collapsible-content collapsible-content--all is-open\"\u003e\n\u003cdiv class=\"collapsible-content__inner rte\"\u003eLumicon 2 Inch SCT Rear Cell Hydrogen-Beta Filter is also known as the Horsehead Nebula filter. This filter isolates only the hydrogen-beta line of the spectrum (486nm) in a narrow pass-band just 9nm wide, providing maximum contrast. The filter-cell threads onto a Schmidt-Cassegrain Telescope rear-cell, and presents male SCT threads for accessory attachment. The filter cell allows ease of eyepiece changes without threading\/unthreading the filter, and is also easier to change-out than the standard 2″ filter cell with gloves on, for cold-weather observing. Aids in viewing of extremely faint nebulous objects such as the Horsehead, Cocoon and California Nebulae. In many cases, the Lumicon Hydrogen-Beta Filter is the ONLY way to view these objects. Recommended for 8″ or larger telescopes. Lumicon filters remain the world’s best and strictest quality control standards are employed throughout the production process. Each Lumicon Hydrogen-Beta Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the H-Beta emission line.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cform id=\"contact-6795773116569-6795773116569\" class=\"contact-form\" method=\"post\" action=\"https:\/\/farpointastro.com\/contact#contact-6795773116569-6795773116569\"\u003e\u003c\/form\u003e","brand":"Lumicon","offers":[{"title":"Default Title","offer_id":43125857976549,"sku":"FAP-LF3065","price":170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/lumicon-2-inch-sct-rear-cell-hydrogen-b-filter-lf3065-astronomy-plus_479e4d38-5513-450a-aa23-cc5a8313cd67.jpg?v=1690487495"},{"product_id":"optolong-sho-3nm-narrowband-filters-kit","title":"Optolong SHO 3nm Narrowband Filters Kit","description":"\u003ch2\u003eOptolong SHO 3nm Narrowband Filters Kit\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eOptolong SHO-3nm Narrowband Filters Introduction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOptolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software.\u003c\/p\u003e\n\u003cp\u003eExtra narrowband SIICCD3nm filter  (Sulful II for CCD) is designed for nebula observation allowing 3nm bandwidth of light  centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/p\u003e\n\u003cp\u003eH-Alpha 3nm filter is the popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotographer filter for highest contrast and revealing subtle nebula details.\u003c\/p\u003e\n\u003cp\u003eExtra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).\u003c\/p\u003e\n\u003cp\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernoval remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eGive you higher contrast and greater detailed viewing;\u003c\/p\u003e\n\u003cp\u003eDecrease background noise and improve the contrast of objects;\u003c\/p\u003e\n\u003cp\u003eIncrease the faint nebula signal and make i tto be brightness;\u003c\/p\u003e\n\u003cp\u003eWith narrow band fitlers kit, you are able to process a hubble image;\u003c\/p\u003e\n\u003cp\u003eThrough the optimization of the sustrate and upgrading of coating technology.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eReference Spectrum\u003c\/strong\u003e  \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/56095a94c3cebfd0ebdc80f423d27c58.png\" width=\"528\" height=\"244\"\u003e\u003c\/p\u003e\n\u003cp\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp\u003e▲The BLUE line shows the transmission of OIII3nm.The H-Alpha 3nm line is showen in GREEN. And the SII 3nm filter line is shown in RED.\u003c\/p\u003e\n\u003cp\u003e \u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" width=\"670\" height=\"110\"\u003e \u003cstrong\u003eCoating Technology\u003c\/strong\u003e ·Multi-layers anti-reflection coating ·Non-cementing optical substrate coating ·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change. ·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.    \u003cimg alt=\"\" src=\"http:\/\/optolong.com\/uploads\/images\/20191111\/497e351dc95fe824244ce6bf6135cbd0.png\" width=\"484\" height=\"211\"\u003e    \u003c\/p\u003e\n\u003ch3\u003ePerformances\u003c\/h3\u003e\n\u003ch2\u003e\u003cstrong\u003eOptolong SHO-3nm Narrowband Filters Performance\u003c\/strong\u003e\u003c\/h2\u003e\n \n\u003cp data-mce-fragment=\"1\"\u003eAs we all know, OIII narrow band filter has always been a problem in the aspect of halo. Thanks to the experience of 7nm narrow band filter, the halo of OIII 3nm filter was optimized by optimizing the coating technology. This time, we also conducted a qualitative halo test in the bright star of veil Nebula, and it can be seen from the original picture that OIII 3nm performs better in the bright star.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTelescope：RASA 11寸 f2\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCamera：QHY 600\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eMount:艾顿 IOptron CEM120\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOptolong OIII-3nm single 10min\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Wuzhen\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" class=\"lazyloaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\" width=\"506\" height=\"317\"\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eExemples with SHO 3nm filters\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eI. \u003cu data-mce-fragment=\"1\"\u003eThe Bubble Nebula (NGC 7635)  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eAstrodoc Ron Brecher \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAcquisition, focusing, and control of Paramount MX mount with N.I.N.A., TheSkyX and PHD2. Focus with Optec DirectSync motor and controller. Equipment control with PrimaLuce Labs Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from Ron‘s \u003ca data-mce-fragment=\"1\" href=\"https:\/\/skyshed.com\/\" data-mce-href=\"https:\/\/skyshed.com\/\"\u003eSkyShed\u003c\/a\u003e in Guelph. Average transparency and seeing. Data acquired Oct 18-19, 2021 under a brightly moonlit sky (Moon 12 days old)..\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSky-Watcher Esprit 150 f\/7 refractor and QHY600M camera with Optolong H-alpha, O(III) and S(II) 3nm filters – FIRST LIGHT WITH 3nm BANDPASS FILTERS\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHa: 9 x 20m = 3hr00m\u003cbr data-mce-fragment=\"1\"\u003eO3: 10 x 20m = 3hr20m\u003cbr data-mce-fragment=\"1\"\u003eS2: 9 x 20m = 3hr00m\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTotal: 9hr20m\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eImage scale 0.72 arcsec per pixel\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\" width=\"479\" height=\"333\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅡ.\u003cu data-mce-fragment=\"1\"\u003e Pacman Nebula NGC 281 in the Hubble Palette  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eLuca Fornaciari Astrophotography  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003ePacman Nebula NGC 281 in the Hubble Palette\u003cbr data-mce-fragment=\"1\"\u003eWith the bad weather persisting I have taken these last few weeks to experiment with new way in the development of narrowband shots.\u003cbr data-mce-fragment=\"1\"\u003eI’m happy because I’m defining a Hubble Palette that really feels mine, designing it a little at a time.\u003cbr data-mce-fragment=\"1\"\u003eNarrowband is creative and fun because it allows us a good deal of freedom to experiment with the integration of the individual channels and the image you see is a developing version of what I am building.\u003cbr data-mce-fragment=\"1\"\u003eThe image was obtained with the new 3nm Optolong filters. If the bad weather will allow me a few nights I will soon finish my tests on these filters, but for now the impressions are really good.\u003cbr data-mce-fragment=\"1\"\u003e240 minutes of Ha, 510 of OIII and 260 minutes of SII with the ASI 294MM and the Sky-Watcher 300 f\/4.\u003cbr data-mce-fragment=\"1\"\u003eI wish you a beautiful sunny day!\u003cbr data-mce-fragment=\"1\"\u003eSETUP:\u003cbr data-mce-fragment=\"1\"\u003eSky-Watcher 300 f \/ 4 on EQ8R-Pro\u003cbr data-mce-fragment=\"1\"\u003eZWO ASI 294MM, \u003cstrong data-mce-fragment=\"1\"\u003eOptolong Filters Ha 3nm, OIII 3nm, SII 3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\" data-mce-href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\" width=\"529\" height=\"352\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIII.\u003cu data-mce-fragment=\"1\"\u003e NGC7000  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003eTommaso Massimo Stella  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFinalmente, dopo mesi, sono riuscito a testare parte dei nuovi filtri Optolong Astronomy Filter\u003cstrong data-mce-fragment=\"1\"\u003e ha 3nm\u003c\/strong\u003e ancora non sul mercato (sono un beta tester).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/cd8b15936c6847961837359233668f42.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/cd8b15936c6847961837359233668f42.jpg\" width=\"522\" height=\"372\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅣ.\u003cu data-mce-fragment=\"1\"\u003e Nebulose Nord America  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003eTommaso Massimo Stella  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTest dei nuovi filtri Optolong Astronomy Filter H alpha e OIII a 3nm (non ancora sul mercato) sotto cieli inquinati (Bortle 8\/9), con camera a colori e diametro limitato.\u003cbr data-mce-fragment=\"1\"\u003eElaborazione basica, senza considerare il colore delle stelle.\u003cbr data-mce-fragment=\"1\"\u003ePurtroppo il meteo mi ha concesso circa 3 ore per canale, manca ancora l’SII per comporre l’Hubble palette, spero di poter terminare la prossima settimana.\u003cbr data-mce-fragment=\"1\"\u003eLights: \u003cstrong data-mce-fragment=\"1\"\u003e12x900s (Ha 3nm) + 20x600s (OIII 3nm)\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eTelescope: Takahashi FS-60CB + Reducer 0,72x\u003cbr data-mce-fragment=\"1\"\u003eCamera: QHY 168C\u003cbr data-mce-fragment=\"1\"\u003eMount: Skywatcher AZ-EQ6 GT\u003cbr data-mce-fragment=\"1\"\u003eProcessing: DeepSkyStacker, PixInsight, Photoshop CC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221731702215327\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221731702215327\u0026amp;set=a.1349013078910\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/287447fea211bf2ccedc07827566b595.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/287447fea211bf2ccedc07827566b595.jpg\" width=\"534\" height=\"350\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eV.\u003cu data-mce-fragment=\"1\"\u003e North America \u0026amp; Pelican Nubulae (Hubble Palette)  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003eTommaso Massimo Stella  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eShooting took place on 1,4,27 and 28 October 2021 in Taranto (Italy) at about 20m above sea level.\u003cbr data-mce-fragment=\"1\"\u003eLights: 16x900s Ha + 21x600s OIII + 9x900s OIII + 16x900s SII\u003cbr data-mce-fragment=\"1\"\u003eSky: Bortle 9\u003cbr data-mce-fragment=\"1\"\u003eTotal exposure: 13,75 h\u003cbr data-mce-fragment=\"1\"\u003eTelescope: Takahashi FS-60CB + Reducer 0,72x\u003cbr data-mce-fragment=\"1\"\u003eCamera: QHY 168C\u003cbr data-mce-fragment=\"1\"\u003eFilters: Optolong Astronomy Filter \u003cstrong data-mce-fragment=\"1\"\u003eHa, OIII, SII 3nm\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eMount: Skywatcher AZ-EQ6 GT\u003cbr data-mce-fragment=\"1\"\u003eProcessing: DeepSkyStacker, PixInsight, Photoshop CC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221855955121572\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221855955121572\u0026amp;set=a.1349013078910\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/128c7ecb6dab1b8929703eb3a4c2112b.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/128c7ecb6dab1b8929703eb3a4c2112b.jpg\" width=\"531\" height=\"375\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅥ.\u003cu data-mce-fragment=\"1\"\u003e The Lobster Claw Nebula  © Astrodoc Ron Brecher\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003e  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAcquisition, focusing, and control of Paramount MX mount with N.I.N.A., TheSkyX and PHD2. Focus with Optec DirectSync motor and controller. Equipment control with PrimaLuce Labs Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from my \u003ca data-mce-fragment=\"1\" href=\"https:\/\/skyshed.com\/\" data-mce-href=\"https:\/\/skyshed.com\/\"\u003eSkyShed\u003c\/a\u003e in Guelph. Average transparency and seeing. Acquired October 28-November 8, 2021 under a partly moonlit sky.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSky-Watcher Esprit 150 f\/7 refractor and QHY600M camera with \u003cstrong data-mce-fragment=\"1\"\u003eOptolong H-alpha, O(III) and S(II) 3nm filters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eChrominance: Takahashi FSQ-106 ED IV @ f\/5 and QHY367C Pro one-shot colour camera with Optolong UV\/IR filter.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHa: 22 x 20m = 7hr20m\u003cbr data-mce-fragment=\"1\"\u003eO3: 22 x 20m = 7hr20m\u003cbr data-mce-fragment=\"1\"\u003eS2: 22 x 20m = 7hr20m189 x 5m\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOSC = 15hr45m\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTotal: 22hr for narrowband image; 37hr45m for broadband\/narrowband blend\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eImage scale 0.72 arcsec per pixel\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eProcessing workflow is for the Hubble Palette image.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe broadband image was processed similar to \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/ic-5068\/\" data-mce-href=\"https:\/\/astrodoc.ca\/ic-5068\/\"\u003eIC 5068\u003c\/a\u003e, with the luminance of the narrowband image used instead of Ha alone.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eData Reduction and Cleanup\u003cbr data-mce-fragment=\"1\"\u003eThe WeightedBatchPreProcessing script was used to perform calibration, cosmetic correction, weighting, registration and integration of all frames.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/lobster-claw\/?fbclid=IwAR2RGCHZvQBaqsNOhFm83nRrC5pVHXXq9iVBC_Qy0NIj7BYAaGp9AgSKn5I\" data-mce-href=\"https:\/\/astrodoc.ca\/lobster-claw\/?fbclid=IwAR2RGCHZvQBaqsNOhFm83nRrC5pVHXXq9iVBC_Qy0NIj7BYAaGp9AgSKn5I\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/f91f0bc04fb22c68f6c0ac11fa7b00ab.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/f91f0bc04fb22c68f6c0ac11fa7b00ab.jpg\" width=\"497\" height=\"371\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅦ.\u003cu data-mce-fragment=\"1\"\u003e NGC6960 © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=2981303708797488\u0026amp;set=a.1385013411759867\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=2981303708797488\u0026amp;set=a.1385013411759867\"\u003eAndrea Andreotto Maggi Astrophoto\u003c\/a\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003e  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTelescopio Artec 200\u003cbr data-mce-fragment=\"1\"\u003eCamera Zwo Asi 294 MM\u003cbr data-mce-fragment=\"1\"\u003eFiltri Optolong Astronomy Filter \u003cstrong data-mce-fragment=\"1\"\u003eRGB HA 3nm OIII 3nm\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e60 Light RED 300 sec\u003cbr data-mce-fragment=\"1\"\u003e60 Light GREEN 300 sec\u003cbr data-mce-fragment=\"1\"\u003e60 Light BLUE 300 sec\u003cbr data-mce-fragment=\"1\"\u003e36 light HA 600 sec\u003cbr data-mce-fragment=\"1\"\u003e36 light OIII 600 sec\u003cbr data-mce-fragment=\"1\"\u003eMontatura 10 Micron 1000 hps\u003cbr data-mce-fragment=\"1\"\u003eSoftware Voyager Astrophotography Automation\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/ce882079db0e723d48abd5b89337cc5e.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/ce882079db0e723d48abd5b89337cc5e.jpg\" width=\"474\" height=\"323\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅧ.\u003cu data-mce-fragment=\"1\"\u003e Rosette nebula © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo?fbid=2990297881231404\u0026amp;set=a.1385013411759867\" data-mce-href=\"https:\/\/www.facebook.com\/photo?fbid=2990297881231404\u0026amp;set=a.1385013411759867\"\u003eAndrea Andreotto Maggi Astrophoto\u003c\/a\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003e  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eProve di post su vecchie riprese\u003cbr data-mce-fragment=\"1\"\u003eTelescopi o obiettivi di acquisizione: Sharpstar 76EDPH ·\u003cbr data-mce-fragment=\"1\"\u003eCamere zwo asi 071 MC zwo Asi 1600 MM zwo asi 2600 MC\u003cbr data-mce-fragment=\"1\"\u003eMontature: SkyWatcher EQ6 PRO GOTO\u003cbr data-mce-fragment=\"1\"\u003eFiltri: Optolong \u003cstrong data-mce-fragment=\"1\"\u003e2″ Ha O3 S2\u003c\/strong\u003e · Optolong L-Pro 2″ · Optolong L-eNhance\u003cbr data-mce-fragment=\"1\"\u003e58 light 300 sec\u003cstrong data-mce-fragment=\"1\"\u003e L-PRO\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e70 light 600 sec \u003cstrong data-mce-fragment=\"1\"\u003eL-eNhance\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003e20 light 600 sec HA\u003cbr data-mce-fragment=\"1\"\u003e20 Light 600 sec OIII\u003cbr data-mce-fragment=\"1\"\u003e20 Light 600 sec SII\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/ee5691a92bcf2b9f7a7ccf80c878359b.jpg\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/ee5691a92bcf2b9f7a7ccf80c878359b.jpg\" width=\"457\" height=\"332\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅨ.\u003cu data-mce-fragment=\"1\"\u003e Ha3nm test © YaGe\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\" data-mce-href=\"https:\/\/www.facebook.com\/photo\/?fbid=10221694325160924\u0026amp;set=a.1349013078910\"\u003e  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLens: SharpStar ACL200\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCamera: ZWO ASI 6200 MM Pro\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eMount: iOptron CEM60\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eGuide: SharpStar ACL200\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eStar guide camera: ZWO ASI290MM mini\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSoftware: Pleiades Astrophoto PixInisight ·Astro Pixel Processor\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFilter: \u003cstrong data-mce-fragment=\"1\"\u003eOptolong Ha 3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright：鸭哥\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/1aa189a6260eac8d82b96ce1f393bea0.png\" class=\"lazyloaded\" data-mce-src=\"https:\/\/www.optolong.com\/uploads\/images\/20211201\/1aa189a6260eac8d82b96ce1f393bea0.png\" width=\"475\" height=\"616\"\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn The Box\u003c\/h3\u003e\n\u003cp\u003eSulfur II, H-Alpha, Oxygen III Filters\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"2\" Mounted","offer_id":43697803788517,"sku":"OL-SHO-3NM-2","price":1675.0,"currency_code":"CAD","in_stock":true},{"title":"36mm unmounted","offer_id":43697803821285,"sku":"OL-SHO-3NM-36","price":1340.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-sho-3nm-narrowband-filters-kit-astronomy-plus-1_c32687df-2fc2-4cb4-8d52-414b9db3f91e.png?v=1690487751"},{"product_id":"pegasus-astro-photographic-filter-ha-2-mounted-filter-peg-fltr-2m-ha","title":"Pegasus Astro Photographic Filter - Ha 2'' Mounted Filter (PEG-FLTR-2M-Ha)","description":"\u003ch3\u003ePegasus Astro Photographic Filter - Ha 2'' Mounted Filter\u003c\/h3\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThis narrowband filter has a 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, high and low pressure sodium vapor lights, and natural light caused by neutral oxygen emission in our atmosphere (i.e., skyglow). The narrowband H-alpha astrophotography filter allows for highest contrast and revealing subtle nebula details.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cimg src=\"https:\/\/www.deepspaceproducts.com\/uimages\/pegasus\/Filter_narrowband_graph.png\" alt=\"\"\u003e - Ha 2''\u003c\/div\u003e","brand":"Pegasus","offers":[{"title":"Default Title","offer_id":43125882912997,"sku":"PEG-FLTR-2M-Ha","price":344.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/pegasus-astro-photographic-filter-ha-2-mounted-filter-peg-fltr-2m-ha-astronomy-plus_93f9a34d-ca77-452a-b827-b0ada7582d0c.jpg?v=1690487821"},{"product_id":"pegasus-astro-photographic-filter-oiii-2-mounted-filter-peg-fltr-2m-o3","title":"Pegasus Astro Photographic Filter - OIII 2'' Mounted Filter (PEG-FLTR-2M-O3)","description":"\u003ch3\u003ePegasus Astro Photographic Filter - OIII 2'' Mounted Filter\u003c\/h3\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eThe Oxygen III (OIII) CCD 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm which corresponds to OIII emission lines. This reduces the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, high and low pressure sodium vapor lights, and the natural light caused by neutral oxygen emission in our atmosphere (i.e., skyglow). OIII narrowband filters allow only a small portion of light to pass through the filter, resulting in diffuse and planetary nebulae to appear more clearly against a blacker background of space.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/www.deepspaceproducts.com\/uimages\/pegasus\/Filter_narrowband_graph.png\" alt=\"\" width=\"542\" height=\"314\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eTechnical Specification\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ctable dir=\"ltr\" cellspacing=\"0\" cellpadding=\"0\" border=\"1\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"194\"\u003e \u003ccol width=\"199\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Specifications\"}' rowspan=\"1\" colspan=\"2\"\u003eSpecifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Filter Size:\"}'\u003eFilter Size:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"2 inch\"}'\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Polish: \"}'\u003ePolish:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"1\/4 wavefront, Parfocal\"}'\u003e1\/4 wavefront, Parfocal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Transmission Range:\"}'\u003eTransmission Range:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; border-bottom: 1px solid #ececec; font-size: 0.9em; line-height: 1.3; padding: 0.5em 0px 0.5em 0.5em; text-align: left; color: #666666;\" data-sheets-value='{\"1\":2,\"2\":\"T \u0026gt; 80% 500 nm, 7nm FWHM\"}'\u003eT \u0026gt; 80% 500 nm, 7nm FWHM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Coatings: \"}'\u003eCoatings:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Multilayer Anti-reflection\"}'\u003eMultilayer Anti-reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Type:\"}'\u003eType:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Narrowband (7nm)\"}'\u003eNarrowband (7nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Shape: \"}'\u003eShape:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Round\"}'\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Thickness:\"}'\u003eThickness:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"5mm (filter) + 2.5mm (thread)\"}'\u003e5mm (filter) + 2.5mm (thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Thread: \"}'\u003eThread:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"M48, 0.75 pitch\"}'\u003eM48, 0.75 pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan mce-data-marked=\"1\"\u003eFilter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003ePegasus 1-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Pegasus","offers":[{"title":"Default Title","offer_id":43125882945765,"sku":"PEG-FLTR-2M-O3","price":344.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/pegasus-astro-photographic-filter-oiii-2-mounted-filter-peg-fltr-2m-o3-astronomy-plus.webp?v=1690487821"},{"product_id":"baader-h-beta-narrowband-filter-5-5nm-cmos-optimized","title":"Baader H-Beta Narrowband-Filter (5.5nm) – CMOS-optimized","description":"\u003ch2\u003eBaader H-Beta Narrowband-Filter (5.5nm) – CMOS-optimized\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBaader H-Beta Narrowband Filter – Precision Grade\u003c\/li\u003e\n\u003cli\u003e5.5 nm FWHM, recommended for optical systems from f\/10 to f\/3.5\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim\u003c\/li\u003e\n\u003cli\u003eOptimized for modern CMOS cameras, but likewise excellent for CCD camera technologies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCMOS-optimized Baader Filters\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eIncreased contrast\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eEver more narrow passbands\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReflex-Blocker\u003csup\u003e™\u003c\/sup\u003e coatings\u003c\/strong\u003e, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFWHM on each filter category carefully designed\u003c\/strong\u003e to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical filter thickness\u003c\/strong\u003e to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened edges all around\u003c\/strong\u003e, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach filter coated individually\u003c\/strong\u003e, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, \u003ca href=\"https:\/\/www.baader-planetarium.com\/en\/blog\/information-about-baader-filters-and-filtercells\/\"\u003eread more\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca class=\"ajax-popup\" href=\"https:\/\/www.baader-planetarium.com\/en\/blog\/life-coat\/\"\u003eLife-Coat™\u003c\/a\u003e:\u003c\/strong\u003e evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003eDON´T BE MISLED.\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThese all new CMOS-optimized filters work magnificently \u003cstrong\u003ewith all existing digital camera technologies, be it CMOS or CCD\u003c\/strong\u003e. However – an owner of CCD-camera-technology will still find our previous, extremely affordable, narrowband filter technology to be fully apt for excellent imaging. But: \"the Better always is enemy to the Good\". \u003cstrong\u003eWhich side should face the telescope?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.baader-planetarium.com\/media\/wysiwyg\/filter-frontside-indicator.gif\"\u003e\u003cimg src=\"https:\/\/www.baader-planetarium.com\/media\/wysiwyg\/filter-frontside-indicator.gif\" width=\"256\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1499.53px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCOLOUR\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eH-Beta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e5.5 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e486,1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCMOS-optimized with\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e \u003c\/span\u003eLife-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e1 25\", 2\", 31mm, 36mm,50.4mm, 50x50mm, 65x65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCMOS, CCD, H-Beta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMounted (LPFC 6mm) \/ Unmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSingle Filter or Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 339.902px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eround or square\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-pdp-tab-content=\"description\" class=\"pdp-content-description rte active\" data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv class=\"centerImage\" data-mce-fragment=\"1\"\u003e\n\u003cdiv data-pdp-tab-content=\"description\" class=\"pdp-content-description rte active\" data-mce-fragment=\"1\"\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBaader H-Beta Narrowband-Filter (5.5nm) – CMOS-optimized\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\nLimited-Lifetime-Warranty for CMOS-optimized Baader filters\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv aria-hidden=\"false\" role=\"tabpanel\" aria-labelledby=\"st-link-life-coat_0-1\" id=\"st-life-coat_0-1\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eA Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings.\u003c\/p\u003e\n\u003cp\u003eBaader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from mis-use, physical damage through improper handling, or improper cleaning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":43541664104677,"sku":"BAA-FCHBN-1 (Baader #2961080)","price":270.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43541664137445,"sku":"BAA-FCHBN-2 (Baader #2961083)","price":430.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":43541664170213,"sku":"BAA-FCHBN-RD31 (Baader #2961081)","price":284.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":43541664202981,"sku":"BAA-FCHBN-RD36 (Baader #2961082)","price":314.0,"currency_code":"CAD","in_stock":true},{"title":"50mm","offer_id":43541664235749,"sku":"BAA-FCHBN-RD50 (Baader #2961084)","price":459.0,"currency_code":"CAD","in_stock":true},{"title":"50 x 50mm","offer_id":43541664268517,"sku":"BAA-FCHBN-SQ50 (Baader #2961085)","price":503.0,"currency_code":"CAD","in_stock":true},{"title":"65 x 65mm","offer_id":43541664301285,"sku":"BAA-FCHBN-SQ65 (Baader #2961086)","price":634.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-h-beta-narrowband-filter-5-5nm-cmos-optimized-astronomy-plus-1_6f4462f8-14ae-47a4-9f63-b9e9d1d57eea.png?v=1690487822"},{"product_id":"pegasus-astro-photographic-filter-s2-2-mounted-photographic-filter-peg-fltr-2m-s2","title":"Pegasus Astro Photographic Filter - SII 2'' mounted Filter (PEG-FLTR-2M-S2)","description":"\u003ch2\u003ePegasus Astro Photographic Filter - S2 2'' Mounted Photographic Filter\u003c\/h2\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eSulfur II (SII) filters are a narrow-band-filters for CCD\/CMOS photography. This extra narrowband SII CCD 7nm filter is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, high and low pressure sodium vapor lights, and the natural light caused by neutral oxygen emission in our atmosphere (i.e., skyglow). The filter only lets the light of the ionized sulfur pass and blocks the rest of the visual spectrum.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg alt=\"\" src=\"https:\/\/www.deepspaceproducts.com\/uimages\/pegasus\/Filter_narrowband_graph.png\" width=\"511\" height=\"297\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch3\u003eTechnical Specification\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ctable dir=\"ltr\" cellspacing=\"0\" cellpadding=\"0\" border=\"1\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"194\"\u003e \u003ccol width=\"199\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" rowspan=\"1\" data-sheets-value='{\"1\":2,\"2\":\"Specifications\"}'\u003eSpecifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Filter Size:\"}'\u003eFilter Size:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"2 inch\"}'\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Polish:\"}'\u003ePolish:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"1\/4 wavefront, Parfocal\"}'\u003e1\/4 wavefront, Parfocal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Transmission Range: \"}'\u003eTransmission Range:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"T \u0026gt; 80%, 627 nm, 7nm FWHM\"}' style=\"box-sizing: border-box; border-bottom: 1px solid #ececec; font-size: 0.9em; line-height: 1.3; padding: 0.5em 0px 0.5em 0.5em; text-align: left; color: #666666;\"\u003eT \u0026gt; 80%, 627 nm, 7nm FWHM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Coatings: \"}'\u003eCoatings:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Multilayer Anti-reflection\"}'\u003eMultilayer Anti-reflection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Type:\"}'\u003eType:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Narrowband (7nm\"}'\u003eNarrowband (7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Shape:\"}'\u003eShape:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Round\"}'\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Thickness: \"}'\u003eThickness:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"5mm (filter) + 2.5mm (thread)\"}'\u003e5mm (filter) + 2.5mm (thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"Thread: \"}'\u003eThread:\u003c\/td\u003e\n\u003ctd data-sheets-value='{\"1\":2,\"2\":\"M48, 0.75 pitch\"}'\u003eM48, 0.75 pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan mce-data-marked=\"1\"\u003eFilter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003ePegasus 1-Year Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Pegasus","offers":[{"title":"Default Title","offer_id":43125883306213,"sku":"PEG-FLTR-2M-S2","price":344.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/pegasus-astro-photographic-filter-sii-2-mounted-filter-peg-fltr-2m-s2-astronomy-plus.webp?v=1690487821"},{"product_id":"astronomik-h-beta-filter","title":"Astronomik H-Beta Filter","description":"\u003ch2\u003eAstronomik H-Beta Filter\u003c\/h2\u003e\nThe Astronomik H-beta is a filter for visual observation, in particular with instruments of larger aperture. It lets the light of the H-beta emission line pass nearly unhindered and blocks the remaining spectral range to the extent that the eye is dark adapted. By the use of the Astronomik H-beta filter, the contrast is increased so strongly, that even the observation of the Horse Head Nebulae with telescopes of 10\" - 12\" reaches the realm of the possible.\n\u003ch4\u003e\u003cstrong\u003eMain use\u003c\/strong\u003e\u003c\/h4\u003e\nThe optimal aperture ratio for the use of the filter is 1:4,5 to 1:6. The range of application extends from 1:3.5 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, are only apparent with the Astronomik filters when extremely fast aperture ratios of 1:3 and higher are used. The Astronomik H-beta filter will allow you to view large objects, in the whole field of view of the eyepiece, even when using wide-angle eyepieces - not only in the center of the eyepiece. This filter should be used on telescopes with a diameter of 8 \" (20cm) or larger. Smaller instruments do not gather enough light for meaningful and satisfying astronomical work. Due to the high optical quality of the Astronomik H-beta filter substrate you will see the same needle-sharp stars as you would from your regular telescope.\n\u003ch4\u003e\u003cstrong\u003eOther uses\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIn the whole sky, there are few objects that benefit from the use of this filter in visual observation. On the other hand h-beta filters often decide about seeing or not seeing an object. Without a filter the eye is hardly able to discover the low contrasts of H-alpha regions.\u003c\/li\u003e\n\u003cli\u003eWith EOS Clip Filter even in extreme light polluted areas photography with DSLR cameras becomes possible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cbr\u003e","brand":"Astronomik","offers":[{"title":"1.25\"","offer_id":43465636217061,"sku":"AK-8H0057","price":135.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43465636249829,"sku":"AK-8h0058","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"SC Rear Cell","offer_id":43465636282597,"sku":"AK-8h00ar","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"T-Mount - M42 x 0.75","offer_id":43465636315365,"sku":"AK-8h00aq","price":271.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik-h-beta-filter-astronomy-plus-1.webp?v=1690487958"},{"product_id":"astronomik-oiii-6nm-ccd-filter","title":"Astronomik OIII 6nm CCD Filter","description":"\u003ch2 data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAstronomik Oiii 6nm CCD Filter\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cbr\u003eThe OIII-CCD Filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 501nm and the background is increased enormous!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDue to the combination of the narrow bandwidth of 6nm and the high transmission of close to 100%, the filter gives you an enormous contrast boost, as all unwanted light from other wavelengths than \u0026lt;xx\u0026gt; is blocked form UV up to the IR. This results in an extremly dark background.\u003cbr data-mce-fragment=\"1\"\u003eThe FWHM of 6nm is matched to give you optimal performance with CCD and CMOS sensors with a very low dark current! The 6nm filter is the best choice if you are observing from a heavily light polluted site or if you are imaging faint objects in starcrowded regions of the milkyway.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eDue to the new MFR coating technique you may use one single filter on all instruments up to f\/4 without a significant reduction in performance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eDer Astronomik H-alpha filter MUST NOT BE USED for solar observation!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTechnical data of the filter:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGuaranteed Transmission of more than 88% at the OIII Line (501 nm)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eTypical Transmission of 92...95% at the OIII Line (501 nm)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFull-Width-Half Maximum (FWHM): 6nm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eperfect blocking of unwanted light from UV up to the IR\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eparfokal with all Astronomik filters\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMFR Coating technique: Usable with all optics up to f\/4\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThickness of 1mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNot sensitive to moisture, scratch resistant, not aging\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eopticaly polished substrate, striae-free and free of residual stresses\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHigh quality storage box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eIf you have to observe from light polluted sites (like most of us...), imaging with Narrowband-Emissionline filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normaly an H-alpha filter should be your first step into this amazing field of astrophotography! With an Narrowband H-alpha filter you will be able to take deep and contrasty images even wih very heavy light pollution or with the full moon high up in the sky!\u003cbr data-mce-fragment=\"1\"\u003eIf you look at other astrophotos, an H-alpha is the best choice for all nebulas glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulas and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003cbr data-mce-fragment=\"1\"\u003eThe h-beta filter is not available in a 6nm version, as this filter has nearly no meaningfull application. To illustrate this, there are two images shown below: Both were taken with a unmodified Canon 650D. Even as the camera has a sensitivity of less than 10% at H-alpha, there is some signal und structure in the h-alpha image, while you cannot see anything on the image taken with an H-beta filter!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOperation of the filter:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe filter blocks all unwanted light from artifical light-pollution, natural airglow and moonlight. Especially light from High- and Low-Pressure Sodium and mercury lights and all lines of natural airglow are 100% blocked. The filter increases the contrast between the sky-background and objects glowing at the OIII line at 501nm.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTipps and Hints for more applications:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eUsing the OIII-CCD filter together with H-alpha-CCD and SII-CCD filters you make produce false-color emission line images (HSO) in the same way as the Hubble-Space telescope. This is possible even from heavyly light polluted sites!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAlternatives:\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe lower priced 12nm filters are the right choice for you, if you own a typical DSLR or a CCD camera with a high dark current! The 12nm filters should be the fist choice for cameras with an integrated guiding sensor, as you will have about twice as much stars compared to the 6nm filter.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e_____________________________\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e\u003cbr\u003e\u003cstrong\u003eAll Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eEach and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eOn the back of each filter-box you will find a label that details the precise sensitivity and band pass measurements for that individual filter inside the box: You will see the max transmission and the recommended range of focal ratio were the filter will give you the best performance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003e_____________________________\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\" style=\"text-align: left;\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelected frame size Astronomik  OIII 6nm CCD Filter\u003c\/li\u003e\n\u003cli\u003ePlastic Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 role=\"tabpanel\" aria-hidden=\"false\" aria-labelledby=\"tab-title-3\" data-content=\"tab-3\" class=\"tab__content tab.box tab__content--active\"\u003e\n\u003cspan\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\"\u003eAstronomik\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003e10 year warranty\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\"","offer_id":44131705258213,"sku":"AK-8h00n6","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44131705290981,"sku":"AK-8h00na","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":44131705323749,"sku":"AK-8h00nd","price":407.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS XL","offer_id":44131705356517,"sku":"AK-8h00nk","price":679.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS R XL","offer_id":44131705389285,"sku":"AK-8h11gi","price":720.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS M","offer_id":44131705422053,"sku":"AK-8h00t1","price":434.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Sony alpha 7","offer_id":44131705454821,"sku":"AK-8h00xp","price":707.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon XL","offer_id":44131705487589,"sku":"AK-8h11c1","price":679.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon Z XL","offer_id":44131705520357,"sku":"AK-8h11l3","price":720.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Pentax K-1","offer_id":44131705553125,"sku":"AK-8h11eo","price":679.0,"currency_code":"CAD","in_stock":true},{"title":"T-Mount (M42x0.75)","offer_id":44131705585893,"sku":"AK-8h00nb","price":598.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":44131705618661,"sku":"AK-8h00nj","price":339.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":44131705651429,"sku":"AK-8h00n4","price":407.0,"currency_code":"CAD","in_stock":true},{"title":"50mm","offer_id":44131705684197,"sku":"AK-8h00nf","price":666.0,"currency_code":"CAD","in_stock":true},{"title":"M49","offer_id":44131705716965,"sku":"AK-8h11jr","price":679.0,"currency_code":"CAD","in_stock":true},{"title":"M52","offer_id":44131705749733,"sku":"AK-8h11ac","price":679.0,"currency_code":"CAD","in_stock":true},{"title":"27mm unmounted","offer_id":44131705782501,"sku":"AK-8h00ml","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"42mm unmounted","offer_id":44131705815269,"sku":"AK-8h11bj","price":489.0,"currency_code":"CAD","in_stock":true},{"title":"50 x 50mm² unmounted","offer_id":44131705848037,"sku":"AK-8h00ni","price":679.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik-oiii-6nm-ccd-filter-astronomy-plus-1.jpg?v=1690488291"},{"product_id":"astronomik-oiii-12nm-ccd-filter","title":"Astronomik OIII 12nm CCD Filter","description":"\u003ch2\u003eAstronomik OIII 12nm CCD Filter\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThis Astronomik OIII-CCD Filter is suitable for imaging of OIII nebulas from observation sites with light pollution and from dark sites as well. The contrast between an object glowing at 501nm and the background is increased enormous!\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eDue to the combination of the narrow bandwidth of 12nm and the high transmission of typically 96% the filter gives you an contrast boost, as all unwanted light from other wavelengths than 501nm is blocked form UV up to the IR. This results in an very dark background compared with any filters with a higher bandwidth\u003cbr\u003eThe FWHm of 12nm is optimized for typical DSLR cameras with CMOS sensors and CCD cameras with a normal\/high dark current: With these cameras the background signal in images taken from heavily light polluted sites is dominated by the dark current of the sensor, not by fluy coming from light pollution. In this case a further reduction of FWHM does not improve the image, as the background will not get darker. Compared to the 6nm filters you have more stars in the field of view which gives you more guiding stars when working with an integrated\/dual guiding chip!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDue to the new MFR coating technique you may use one single filter on all instruments up to f\/3 without a significant reduction in performance.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDer Astronomik H-alpha filter MUST NOT BE USED for solar observation!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eIf you have to observe from light polluted sites (like most of us...), imaging with Narrowband-Emissionline filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normaly an H-alpha filter should be your first step into this amazing field of astrophotography! With an Narrowband H-alpha filter you will be able to take deep and contrasty images even wih very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other astrophotos, an H-alpha is the best choice for all nebulas glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulas and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003cbr\u003eThe h-beta filter is not available in a 6nm version, as this filter has nearly no meaningfull application. To illustrate this, there are two images shown below: Both were taken with a unmodified Canon 650D. Even as the camera has a sensitivity of less than 10% at H-alpha, there is some signal und structure in the h-alpha image, while you cannot see anything on the image taken with an H-beta filter!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOperation of the filter:\u003c\/strong\u003e\u003cbr\u003eThe filter blocks all unwanted light from artifical light-pollution, natural airglow and moonlight. Especially light from High- and Low-Pressure Sodium and mercury lights and all lines of natural airglow are 100% blocked. The filter increases the contrast between the sky-background and objects glowing at the xx line at xy nm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTips and Hints for more applications:\u003c\/strong\u003e\u003cbr\u003eUsing the OIII filter together with H-alpha-CCD and SII-CCD filters you make produce false-color emission line images (HSO) in the same way as the Hubble-Space telescope. This is possible even from heavyly light polluted sites\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlternatives:\u003c\/strong\u003e\u003cbr\u003eIf want to image faint objects in starcrowded regions of the milkyway, propably using short focal lengths, the 6nm filter will be the better choice, as the number of stars is reduced by a factor of ~2. You should even take the 6n mversion if you have a camera with a low thermal current or if you have to observe from a really heavily light polluted site.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e _________________________________\u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e\u003cstrong\u003eAll  Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eEach and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\" style=\"text-align: center;\"\u003e\n\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong\u003eOn the back of each filter-box you will find a label that details the precise sensitivity and band pass measurements for that individual filter inside the box: You will see the max transmission and the recommended range of focal ratio were the filter will give you the best performance.\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cspan\u003e_________________________________\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGuaranteed Transmission of more than 90% at the OIII Line (501 nm)\u003c\/li\u003e\n\u003cli\u003eTypical Transmission of 95% at the OIII Line (501 nm)\u003c\/li\u003e\n\u003cli\u003eFull-Width-Half Maximum (FWHM): 12nm\u003c\/li\u003e\n\u003cli\u003eperfect blocking of unwanted light from UV up to the IR\u003c\/li\u003e\n\u003cli\u003eparfokal with all Astronomik filters\u003c\/li\u003e\n\u003cli\u003eMFR Coating technique: Usable with all optics up to f\/3\u003c\/li\u003e\n\u003cli\u003eThickness of 1mm\u003c\/li\u003e\n\u003cli\u003eNot sensitive to moisture, scratch resistant, not aging\u003c\/li\u003e\n\u003cli\u003eopticaly polished substrate, striae-free and free of residual stresses\u003c\/li\u003e\n\u003cli\u003eHigh quality storage box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSelected frame size Astronomik OIII 12nm CCD Filter\u003c\/li\u003e\n\u003cli\u003ePlastic Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 role=\"tabpanel\" aria-hidden=\"false\" aria-labelledby=\"tab-title-3\" data-content=\"tab-3\" class=\"tab__content tab.box tab__content--active\"\u003e\n\u003cbr\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003cbr style=\"font-size: 0.875rem;\"\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\" data-mce-href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\"\u003eAstronomik\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003e10 year warranty\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\"","offer_id":44127750160613,"sku":"AK-8h00c9","price":189.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44127750193381,"sku":"AK-8h00d0","price":407.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":44127750226149,"sku":"AK-8h00ii","price":271.0,"currency_code":"CAD","in_stock":true},{"title":"XT Clip-Filter EOS APS-C","offer_id":44127750258917,"sku":"AK-8h00kn","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS XL","offer_id":44127750291685,"sku":"AK-8h00lm","price":434.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS R XL","offer_id":44127750324453,"sku":"AK-8h11gh","price":461.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter EOS M","offer_id":44127750357221,"sku":"AK-8h00s4","price":285.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Sony alpha 7","offer_id":44127750389989,"sku":"AK-8h00xi","price":461.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon XL","offer_id":44127750422757,"sku":"AK-8h11ay","price":461.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Nikon Z XL","offer_id":44127750455525,"sku":"AK-8h11l2","price":461.0,"currency_code":"CAD","in_stock":true},{"title":"Clip-Filter Pentax K-1","offer_id":44127750488293,"sku":"AK-8h11en","price":461.0,"currency_code":"CAD","in_stock":true},{"title":"T-Mount (M42 x 0.75)","offer_id":44127750521061,"sku":"AK-8h00bl","price":366.0,"currency_code":"CAD","in_stock":true},{"title":"SC Rear Cell (2\" \/ 24TPI)","offer_id":44127750553829,"sku":"AK-8h00bm","price":448.0,"currency_code":"CAD","in_stock":true},{"title":"31mm","offer_id":44127750586597,"sku":"AK-8h00gj","price":230.0,"currency_code":"CAD","in_stock":true},{"title":"36mm","offer_id":44127750619365,"sku":"AK-8h00gk","price":257.0,"currency_code":"CAD","in_stock":true},{"title":"50mm","offer_id":44127750652133,"sku":"AK-8h00d4","price":434.0,"currency_code":"CAD","in_stock":true},{"title":"M49","offer_id":44127750684901,"sku":"AK-8h11jq","price":434.0,"currency_code":"CAD","in_stock":true},{"title":"M52","offer_id":44127750717669,"sku":"AK-8h11a9","price":448.0,"currency_code":"CAD","in_stock":true},{"title":"27mm unmounted","offer_id":44127750750437,"sku":"AK-8h00mj","price":176.0,"currency_code":"CAD","in_stock":true},{"title":"42mm unmounted","offer_id":44127750783205,"sku":"AK-8h11bh","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"50 x 50mm² unmounted","offer_id":44127750815973,"sku":"AK-8h00hn","price":461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik-oiii-12nm-ccd-filter-astronomy-plus-1.png?v=1690488291"},{"product_id":"antlia-sho-3nm-narrowband-pro-filters-sho-pro","title":"Antlia SHO 3nm Narrowband PRO Filters","description":"\u003ch1 data-mce-fragment=\"1\"\u003eAntlia SHO 3nm Narrowband Pro Filters\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia SHO Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia SHO 3nm Pro filters are designed to deliver 88% transmission which provides you with the maximum signal and well defined nebulae structures.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;88% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe out of band blocking specification is rated OD5 (0.001%) which delivers an excellent SNR (signal to noise ratio) and effective cut-off rate to minimize interference from other wavelengths. Improved sharp cut-off astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHigh transmittance and smallest bandwidth to maximize contrast\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eA single substrate to eliminate internal reflections\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNarrowband Objects: H-alpha Emission Nebulae, H-alpha Emission Nebulae, SII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUse in light polluted areas and dark sites\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eExtends imaging time when the moon is up\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia narrowband Pro filters can be used down to F\/3 systems with slight loss of signal\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAll Antlia Narrowband filters are edge blackened to eliminate internal reflections from stray light\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuperior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis filter is not suited to deep sky objects that do not contain H-alpha emissions.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia SII 3nm Pro filter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the SII signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/p\u003e\n\u003cp\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003e\u003cem\u003eSII Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSchott optical substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness：\u003c\/strong\u003e2mm+\/-0.05mm\/ (3mm+\/-0.05mm for Dia50mm unmounted)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e3nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength)\u003c\/strong\u003e: 671.6nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e＞88%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cem\u003eH-Alpha Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSchott optical substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness:   \u003c\/strong\u003e2mm+\/-0.05mm \/ (3mm+\/-0.05mm for Dia50mm unmounted)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e3nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength)\u003c\/strong\u003e: 656.3nmnm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e＞88%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cem\u003eOIII Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoptical substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness:   \u003c\/strong\u003e2mm+\/-0.05mm \/ (3mm+\/-0.05mm for Dia50mm unmounted)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e3nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength)\u003c\/strong\u003e: 500.7nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e＞85%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSelected Filters\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"value\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia 3-Years Warranty against Delamination\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"1.25\" Round Mounted \/ SHO Filter Set","offer_id":43780850188517,"sku":"AF-SHO-PRO-1.25","price":1086.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ H-Alpha","offer_id":43780852515045,"sku":"AF-HA-PRO-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Oxygen III","offer_id":43780852547813,"sku":"AF-OIII-PRO-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Sulfur II","offer_id":43780852580581,"sku":"AF-SII-PRO-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ SHO Filter Set","offer_id":43780850221285,"sku":"AF-SHO-PRO-31","price":1170.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ H-Alpha","offer_id":43780852613349,"sku":"AF-HA-PRO-31","price":390.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ Oxygen III","offer_id":43780852646117,"sku":"AF-OIII-PRO-31","price":390.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ Sulfur II","offer_id":43780852678885,"sku":"AF-SII-PRO-31","price":390.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ SHO Filter Set","offer_id":43780850254053,"sku":"AF-SHO-PRO-36","price":1320.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ H-Alpha","offer_id":43780852711653,"sku":"AF-HA-PRO-36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ Oxygen III","offer_id":43780852744421,"sku":"AF-OIII-PRO-36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ Sulfur II","offer_id":43780852777189,"sku":"AF-SII-PRO-36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ SHO Filter Set","offer_id":43780850286821,"sku":"AF-SHO-PRO-2","price":1683.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ H-Alpha","offer_id":43780852809957,"sku":"AF-HA-PRO-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Oxygen III","offer_id":43780852842725,"sku":"AF-OIII-PRO-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Sulfur II","offer_id":43780852875493,"sku":"AF-SII-PRO-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ SHO Filter Set","offer_id":43780850319589,"sku":"AF-SHO-PRO-50R","price":2088.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ H-Alpha","offer_id":43780852908261,"sku":"AF-HA-PRO-50R","price":696.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ Oxygen III","offer_id":43780852941029,"sku":"AF-OIII-PRO-50R","price":696.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ Sulfur II","offer_id":43780852973797,"sku":"AF-SII-PRO-50R","price":696.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Square Unmounted \/ SHO Filter Set","offer_id":43780850352357,"sku":"AF-SHO-PRO-50S","price":3195.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Square Unmounted \/ H-Alpha","offer_id":43780853006565,"sku":"AF-HA-PRO-50S","price":1065.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Square Unmounted \/ Oxygen III","offer_id":43780853039333,"sku":"AF-OIII-PRO-50S","price":1065.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Square Unmounted \/ Sulfur II","offer_id":43780853072101,"sku":"AF-SII-PRO-50S","price":1065.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-sho-3nm-narrowband-pro-filters-astronomy-plus-1_9e92846b-a4db-4fb9-8abb-50827bd23729.jpg?v=1690488413"},{"product_id":"antlia-sho-4-5nm-narrowband-edge-filters-sho-edge","title":"Antlia SHO 4.5nm Narrowband EDGE Filters (SHO-EDGE)","description":"\u003ch2 data-mce-fragment=\"1\"\u003eAntlia SHO 4.5nm Narrowband EDGE Filters\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia SHO EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro series has been incorporated into the 4.5nm EDGE narrowband filters. The result is that these filters deliver superior SNR (signal to noise ratio) and better contrast in your images.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia 4.5nm EGDE filters are designed to deliver high transmittance that provides you with the maximum signal to reveal the faintest of nebulae structures.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;90% within 1nm range of the center bandwidth, which means that the SHO 4.5nm EDGE narrowband filters can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 4.5nm EDGE filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal and meets the requirements of fast optics.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHigh transmittance and narrow bandwidth to maximize contrast\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSteep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eA single substrate to eliminate internal reflections\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNarrowband Objects: Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUse in light polluted areas and dark sites\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eExtends imaging time when the moon is up\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia narrowband EDGE filters can be used down to f\/3 systems with minimal loss of signal\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAll Antlia unmounted filters are edge blackened to eliminate internal reflections from stray light\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuperior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis filter is only effective for deep sky objects that contain H-alpha, SII, OIII emissions\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cem data-mce-fragment=\"1\"\u003eSII Specifications:\u003c\/em\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFilter Thickness:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e4.5nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e671.6nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003ePeak Transmission:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e＞90%\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBlocking:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSurface Quality:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTransmitted Wavefront:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eLambda\/4 or better.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eParallelism:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg class=\"jz-image-viewer__img urst-none wh-auto ht-auto lazyloaded\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAghoqZkQYozeKEwgIwwgo4gAY.jpg\" alt=\"\" width=\"519\" height=\"296\" data-v-b1f4dd62=\"\" data-ll-status=\"loaded\" data-mce-fragment=\"1\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAghoqZkQYozeKEwgIwwgo4gAY.jpg\"\u003e\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\n\u003cem data-mce-fragment=\"1\"\u003e\u003c\/em\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cem data-mce-fragment=\"1\"\u003eH-Alpha Specifications:\u003c\/em\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFilter Thickness:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e4.5nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e656.3nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003ePeak Transmission:\u003c\/strong\u003e＞90%\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBlocking:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u0026gt; 5 OD (out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSurface Quality:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTransmitted Wavefront:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eLambda\/4 or better.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eParallelism:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg class=\"need_fix lazyloaded\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgo5SZkQYonP3zmgYwwQo4gQY.jpg\" alt=\"Antlia H-alpha 4.5nm EDGE curve.jpg\" width=\"567\" height=\"324\" data-ll-status=\"loaded\" data-mce-fragment=\"1\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgo5SZkQYonP3zmgYwwQo4gQY.jpg\"\u003e\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\n\u003cem data-mce-fragment=\"1\"\u003e\u003c\/em\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cem data-mce-fragment=\"1\"\u003eOIII Specifications:\u003c\/em\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBasic Substrate:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFilter Thickness:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e4.5nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e500.7nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003ePeak Transmission:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u0026gt;85%\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eBlocking:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSurface Quality:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTransmitted Wavefront:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eLambda\/4 or better. Parallelism: less than 30 arcsec\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg class=\"need_fix lazyloaded\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg9ouZkQYogL624gMwvwo4gQY.jpg\" alt=\"Antlia OIII 4.5nm EDGE curve.jpg\" width=\"577\" height=\"330\" data-ll-status=\"loaded\" data-mce-fragment=\"1\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg9ouZkQYogL624gMwvwo4gQY.jpg\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Recommended:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSolar imaging\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNight visual observation\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Permitted:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the out of band blocking rate, transmittance and band-pass parameters to achieve an optimum result. Each filter is individually tested and scanned by strict QC to ensure that the quality meets the high-performance parameters. The result is that Antlia is known for designing filters for astrophotography that achieve exceptional quality and performance parameters at affordable prices. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSelected Filters\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia 3-Years Warranty Against Delamination\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Round Mounted \/ SHO Filter Set","offer_id":43780896489701,"sku":"AF-SHO-EDGE-1.25","price":789.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ H-Alpha","offer_id":43780896522469,"sku":"AF-HA-EDGE-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Sulfur II","offer_id":43780896588005,"sku":"AF-SII-EDGE-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Round Mounted \/ Oxygen III","offer_id":43780896620773,"sku":"AF-OIII-EDGE-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ SHO Filter Set","offer_id":43780896653541,"sku":"AF-SHO-EDGE-31","price":828.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ H-Alpha","offer_id":43780896686309,"sku":"AF-HA-EDGE-31","price":276.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ Sulfur II","offer_id":43780896719077,"sku":"AF-SII-EDGE-31","price":276.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Round Unmounted \/ Oxygen III","offer_id":43780896751845,"sku":"AF-OIII-EDGE-31","price":276.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ SHO Filter Set","offer_id":43780896784613,"sku":"AF-SHO-EDGE-36","price":957.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ H-Alpha","offer_id":43780896817381,"sku":"AF-HA-EDGE-36","price":319.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ Sulfur II","offer_id":43780896850149,"sku":"AF-SII-EDGE-36","price":319.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Round Unmounted \/ Oxygen III","offer_id":43780896882917,"sku":"AF-OIII-EDGE-36","price":319.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ SHO Filter Set","offer_id":43780896915685,"sku":"AF-SHO-EDGE-2","price":1233.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ H-Alpha","offer_id":43780896948453,"sku":"AF-HA-EDGE-2","price":411.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Sulfur II","offer_id":43780896981221,"sku":"AF-SII-EDGE-2","price":411.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted \/ Oxygen III","offer_id":43780897013989,"sku":"AF-OIII-EDGE-2","price":411.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ SHO Filter Set","offer_id":43780897046757,"sku":"AF-SHO-EDGE-50R","price":1491.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ H-Alpha","offer_id":43780897079525,"sku":"AF-HA-EDGE-50R","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ Sulfur II","offer_id":43780897112293,"sku":"AF-SII-EDGE-50R","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Round Unmounted \/ Oxygen III","offer_id":43780897145061,"sku":"AF-OIII-EDGE-50R","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-sho-4-5nm-narrowband-edge-filters-sho-edge-astronomy-plus-1.webp?v=1690488412"},{"product_id":"antlia-sho-7nm-narrowband-prime-filters-36mm-sho-prime","title":"Antlia SHO 7nm Narrowband Prime Filters 36mm (SHO-PRIME)","description":"\u003ch1 data-mce-fragment=\"1\"\u003eAntlia SHO 7nm Prime Narrowband Pro Filters\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia SHO Prime narrowband filter optimizes the FWHM (full width half maximum) to 7nm bandpass. The suppression of optical density is (OD)4 on unwanted wavelengths.The excellent optical coating characteristics found in the Antlia 3nm Pro series has been incorporated into the 7nm Prime narrowband filters. The result is that these filters deliver superior SNR(signal to noise ratio) and better contrast in your images.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia H-Alpha 7nm Prime filters are designed to deliver 90% transmittance at the CWLHa 656.3nm lines that provides you with the maximum signal and well-defined nebulae structures. Besides, it is wide enough (7nm bandwidth) to pass emission lines at NII 654.8nm and NII 658.3nm.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia OIII 7nm Prime filters are designed to deliver 90% transmission at the 500.7nm line that provides you with the maximum signal to reveal the faintest OIII nebulae structures and the SII 7nm Prime filters are designed to deliver 90% transmittance at Central Wavelength SII 671.6nm.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe out of band blocking specification is rated OD4 (0.01%) which delivers an excellent SNR(signal to noise ratio) and effective cut-off rate to minimize interference from other wavelengths.Improved sharp cut off astrophotography 7nm Prime filters are designed to minimize halos around bright stars. Antlia 7nm Prime filters can be used with nearly all systems as fast as f\/2 with minimal loss in emission signal and meets the requirements of fast optics.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e90% transmittance at Central Wavelength H-alpha 656.3nm line \/ OIII 500.7nm \/ SII 671.6nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFWHM is wide enough to pass both H-alpha and NII lines\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWith wider FWHM, 7nm Prime narrowband filters can be used with fast optics of f\/2 with minimal loss of signal Steep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eA single substrate to eliminate internal reflections Narrowband Objects: H-alpha,NII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUse in light polluted areas and dark sites\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAll Antlia unmounted filters are edge blackened to eliminate internal reflections from stray light\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuperior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis filter is effective for deep sky objects that contain H-alpha and NII emissions\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgverRlwYoxv2YygMwwQo4-wU.jpg\" width=\"590\" height=\"336\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"Antlia OIII 7nm Prime filter spectrum curve.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgvvrWlwYo6PCs8AQwwgo4gAY.jpg\" width=\"630\" height=\"360\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"Antlia SII 7nm Prime filter spectrum curve.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgovTWlwYo2eHkzwcwwQo4gAY.jpg\" width=\"580\" height=\"331\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specification \u003c\/h3\u003e\n\u003ch4\u003e\u003cem\u003eSII Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate:\u003c\/strong\u003e Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness:\u003c\/strong\u003e 2mm+\/-0.05mm for Dia36mm unmounted\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e7nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e671.6nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission:\u003c\/strong\u003e ＞90%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003c\/strong\u003e \u0026gt; 4OD(0.01% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality\u003c\/strong\u003e: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003c\/strong\u003e Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism:\u003c\/strong\u003e less than 30 arcsec\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cem\u003eH-Alpha Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate: \u003c\/strong\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness:\u003c\/strong\u003e 2mm+\/-0.05mm for Dia36mm unmounted\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e7nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e656.3nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission: \u003c\/strong\u003e＞90%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003c\/strong\u003e \u0026gt; 4OD(0.01% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality:\u003c\/strong\u003e S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003c\/strong\u003e Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism:\u003c\/strong\u003e less than 30 arcsec\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cem\u003eOIII Specifications:\u003c\/em\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eBasic Substrate:\u003c\/strong\u003e Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Thickness: \u003c\/strong\u003e2mm+\/-0.05mm for Dia36mm unmounted\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM (Full width at half maximum):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e7nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCWL (Central Wavelength):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e500.7nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak Transmission: \u003c\/strong\u003e＞90%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlocking:\u003c\/strong\u003e \u0026gt; 4OD(0.01% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSurface Quality:\u003c\/strong\u003e S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmitted Wavefront:\u003c\/strong\u003e Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eParallelism: \u003c\/strong\u003eless than 30 arcsec\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eNot Recommended:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eSolar Observing and imaging\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eVisual observation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eWhen we design filters for astronomy imaging systems, we look at how they will work together with optical systems, carefully designing the blocking and band-pass parameters to achieve an optimum result. The out of band blocking rate is a very important performance index since it is designed to sharply attenuate off-band wavelengths. The result is that the Antlia SII 3nm Pro filter delivers excellent contrast with extremely dark backgrounds whilst delivering a high transmission of the SII signal. Such filters are more difficult to produce to a consistently high standard.\u003c\/p\u003e\n\u003cp\u003eEach filter is individually tested and scanned to ensure that the quality meets the high-performance parameters. The end result is a filter that achieves excellent contrast but with a higher production cost. We believe the price to performance ratio compares more favorably than similar premium filters in the market.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eFilters\u003c\/p\u003e\n\u003cp\u003eCase\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eAntlia 3-Years Warranty Against Delamination\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Antlia","offers":[{"title":"H-Alpha","offer_id":43786138616037,"sku":"AF-HA-PRIME-36","price":224.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III","offer_id":43786138648805,"sku":"AF-OIII-PRIME-36","price":224.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur II","offer_id":43786138681573,"sku":"AF-SII-PRIME-36","price":224.0,"currency_code":"CAD","in_stock":true},{"title":"SHO Filter Set","offer_id":43786138714341,"sku":"AF-SHO-PRIME-36","price":672.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-sho-7nm-narrowband-prime-filters-36mm-sho-prime-astronomy-plus-1_79a9ac95-3930-4403-a6fa-553880691453.jpg?v=1690488424"},{"product_id":"baader-3-5-4nm-f-2-ultra-highspeed-filters-cmos-optimized-h-alpha-o-iii-s-ii","title":"Baader 3.5 \/ 4nm f\/2 Ultra-Highspeed Filters – CMOS-optimized (H-alpha \/ O-III \/ S-II)","description":"\u003ch2\u003eBaader 3.5 \/ 4nm f\/2 Ultra-Highspeed Filters – CMOS-optimized (H-alpha \/ O-III \/ S-II)\u003c\/h2\u003e\n\u003cp\u003eBaader has released a whitepaper guiding you how to select the best filter for your telescope system, and why this is important in relation to \"PRESHIFT\" to stay \"on band\".\u003c\/p\u003e\n\u003cp\u003eNow with 47.4 mm unmounted for use with FCCT\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaader H-alpha \/ O-III \/ S-II f \/ 2 Ultra-Highspeed Filter Set - Premium Grade\u003c\/li\u003e\n\u003cli\u003e3.5 \/ 4 nm half width (to harmonize the exposure time of H-alpha with O-III \/ S-II), recommended for extremely fast optical systems from f \/ 3.4 to f \/ 1.8\u003c\/li\u003e\n\u003cli\u003eSpecially designed for the special filter requirements when used with highly opened optics such as the Celestron RASA astrograph\u003c\/li\u003e\n\u003cli\u003eEnables the highest contrast even with the strongest light pollution, minimizes the size of the stars, makes the finest nebula details accessible - indispensable under Bortle 9\/8\/7 \/ (6) sky\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker ™ hard-coated and optically polished - with sealed coating edges ( Life-Coat ™ )\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with a filter front indicator in the form of a black outer edge on the front\u003c\/li\u003e\n\u003cli\u003eOptimized for modern CMOS cameras, but ideally suited for CCD camera technologies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCMOS-Optimized Baader Filter\u003c\/li\u003e\n\u003cli\u003eIncreased contrast\u003c\/li\u003e\n\u003cli\u003eEver more narrow passbands\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1500.12px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" id=\"product-attribute-specs-table\" class=\"data-table\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1500.12px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eSUITABLE FOR F\/RATIO\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e\u0026lt; f\/2.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eH-alpha \/ O-III \/ S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 38px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 38px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003e\n\u003cp data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e2 mm Thickness = 1.25\"\/ 2\" \/ 31mm \/ 36mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e3mm Thickness = 50.4mm \/ 50x50 \/ 65x65\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e3.5 nm (H-alpha) \/ 4 nm (O-III \/ S-II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e656,3 nm \/ 500,7 nm \/ 671,7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 38px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 38px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCMOS-optimized with\u003cspan data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e \u003c\/span\u003eLife-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMultiple\u003cbr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCMOS, CCD, H-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMounted (LPFC 6mm) \/ Unmounted \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003ef\/2 Ultra-Highspeed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 22.1875px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 22.1875px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\"\u003eSingles and Filter-Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eround \/ square (depending on size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBaader 3.5 \/ 4nm f\/2 Ultra-Highspeed Filters\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBaader Limited Lifetime Warranty\u003cbr\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"H-alpha (3.5nm) \/ 1.25\"","offer_id":44050979127525,"sku":"BAA-FCHALHSU-1 (Baader #2961375)","price":431.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 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Available at various sizes and classifications – STD or UHS.\u003c\/p\u003e\n\u003cp\u003eIDAS is a trademark of ICAS Enterprise, Japan\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSTD 3mm thick 50.8 CFW\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eSTD 3mm thick 36mm unmounted\u003c\/li\u003e\n\u003cli\u003eSTD 2.5mm thick 48mm(2\") mounted\u003c\/li\u003e\n\u003cli\u003eUHS 2.5mm thick 48mm(2\") mounted\u003c\/li\u003e\n\u003cli\u003eUHS 3mm thick 48mm(2\") mounted\u003c\/li\u003e\n\u003cli\u003eUHS 2.5mm thick 52mm mounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"entrytext\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSHO Filters set\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e(H-alpha, Oxygen III and Sulfur II filters)\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Standard \/ 36mm unmounted (Standard Only)","offer_id":43673845760229,"sku":"IDA-SHO30STD-36","price":1182.0,"currency_code":"CAD","in_stock":false},{"title":"Standard \/ 2\"(48mm mounted \/ 2.5mm Thick)","offer_id":43673845792997,"sku":"IDA-SHO25STD-48","price":1395.0,"currency_code":"CAD","in_stock":true},{"title":"Standard \/ 50.8mm CFW (STD)","offer_id":43673965986021,"sku":"IDA-SHO30STD-50.8","price":1395.0,"currency_code":"CAD","in_stock":false},{"title":"Ultra High Speed \/ 2\" (48mm mounted \/ 2.5mm Thick)","offer_id":43673845891301,"sku":"IDA-SHO25UHS-48","price":1395.0,"currency_code":"CAD","in_stock":false},{"title":"Ultra High Speed \/ 2\" (48mm mounted \/ 3mm Thick)","offer_id":43673994232037,"sku":"IDA-SHO30UHS-48","price":1395.0,"currency_code":"CAD","in_stock":false},{"title":"Ultra High Speed \/ 52mm mounted (UHS)","offer_id":43673845924069,"sku":"IDA-SHO30UHS-52","price":1395.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/idas-sho-narrowband-set-astronomy-plus.webp?v=1690488534"},{"product_id":"chroma-3nm-h-alpha-filter-optimized-for-f-2-8-f-3-6","title":"Chroma 3nm H-Alpha Filter Optimized for f\/2.8-f\/3.6 (27065)","description":"\u003ch2\u003eChroma 3nm H-Alpha Filter Optimized for f\/2.8-f\/3.6\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eH-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656.3nm, a narrow-band emission filter is required to separate H-alpha from the SII doublet (671.6nm and 673.1nm). Chroma’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan\u003eChroma 3nm H-Alpha Filter of the chosen size\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eChroma Lifetime Warranty\u003cbr\u003e\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\"  Threaded Filter","offer_id":43974528729317,"sku":"CHR-27065-125","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Threaded Filter","offer_id":43974528762085,"sku":"CHR-27065-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":43974528794853,"sku":"CHR-27065-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43974528827621,"sku":"CHR-27065-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":43974528860389,"sku":"CHR-27065-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square Unmounted","offer_id":43974528893157,"sku":"CHR-27065-50x50","price":2170.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-3nm-h-alpha-filter-optimized-for-f2-8-f3-6-27065-astronomy-plus.webp?v=1690489381"},{"product_id":"chroma-3nm-oiii-filter-optimized-for-f-2-8-f-3-6-27066","title":"Chroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6 (27066)","description":"\u003ch2\u003eChroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eChroma’s OIII filters isolate the 500.7nm primary emission line of doubly ionized oxygen. After H-alpha, this is the next most common emission when imaging nebulae. 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aux-optics\u003c\/li\u003e\n\u003cli\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable data-mce-fragment=\"1\" class=\"data-table\" id=\"product-attribute-specs-table\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1348.59px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSUITABLE FOR F\/RATIO\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e\u003cspan data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\u0026gt; f\/3.4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eH-alpha \/ O-III \/ S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e\n\u003cp data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e2 mm Thickness = 1.25\"\/ 2\" \/ 31mm \/ 36mm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e3mm Thickness = 50.4mm \/ 50x50 \/ 65x65\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e3.5 nm (H-alpha) \/ 4 nm (O-III \/ S-II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e\u003cspan data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e656,3 nm \/ 500,7 nm \/ 671,7 nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCMOS-optimized with\u003cspan data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e \u003c\/span\u003eLife-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMultiple\u003cbr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eCMOS, CCD, H-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eMounted (LPFC 6mm) \/ Unmounted \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003e\u003cspan data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003eNarrowband\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eSingles and Filter-Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee;\"\u003e\n\u003cth data-mce-fragment=\"1\" class=\"label\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd data-mce-fragment=\"1\" class=\"data\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto;\"\u003eround \/ square (depending on size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBaader 6.5nm Narrowband Filters\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBaader Limited Lifetime Warranty\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"H-alpha \/ 1.25\"","offer_id":44054452961509,"sku":"BAA-FCHALN-1 (Baader #2961100)","price":217.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 2\"","offer_id":44054452994277,"sku":"BAA-FCHALN-2 (Baader #2961103)","price":369.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 31mm","offer_id":44054453027045,"sku":"BAA-FCHALN-RD31 (Baader #2961101)","price":228.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 36mm","offer_id":44054453059813,"sku":"BAA-FCHALN-RD36 (Baader #2961102)","price":258.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 50mm","offer_id":44054453092581,"sku":"BAA-FCHALN-RD50 (Baader #2961104)","price":383.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 50 x 50mm","offer_id":44054453125349,"sku":"BAA-FCHALN-SQ50 (Baader #2961105)","price":439.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 65 x 65mm","offer_id":44054453158117,"sku":"BAA-FCHALN-SQ65 (Baader #2961106)","price":564.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 1.25\"","offer_id":44054453190885,"sku":"BAA-FCOIIIN-1 (Baader #2961175)","price":213.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 2\"","offer_id":44054453223653,"sku":"BAA-FCOIIIN-2 (Baader #2961178)","price":360.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 31mm","offer_id":44054453256421,"sku":"BAA-FCOIIIN-RD31 (Baader #2961176)","price":225.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 36mm","offer_id":44054453289189,"sku":"BAA-FCOIIIN-RD36 (Baader #2961177)","price":257.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 50mm","offer_id":44054453321957,"sku":"BAA-FCOIIIN-RD50 (Baader #2961179)","price":431.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 50 x 50mm","offer_id":44054453354725,"sku":"BAA-FCOIIIN-SQ50 (Baader #2961180)","price":446.0,"currency_code":"CAD","in_stock":true},{"title":"OIII \/ 65 x 65mm","offer_id":44054453387493,"sku":"BAA-FCOIIIN-SQ65 (Baader #2961181)","price":557.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 1.25\"","offer_id":44054453420261,"sku":"BAA-FCSIIN-1 (Baader #2961250)","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 2\"","offer_id":44054453453029,"sku":"BAA-FCSIIN-2 (Baader #2961253)","price":357.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 31mm","offer_id":44054453485797,"sku":"BAA-FCSIIN-RD31 (Baader #2961251)","price":223.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 36mm","offer_id":44054453518565,"sku":"BAA-FCSIIN-RD36 (Baader #2961252)","price":255.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 50mm","offer_id":44054453551333,"sku":"BAA-FCSIIN-RD50 (Baader #2961254)","price":427.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 50 x 50mm","offer_id":44054453584101,"sku":"BAA-FCSIIN-SQ50 (Baader #2961255)","price":445.0,"currency_code":"CAD","in_stock":true},{"title":"SII \/ 65 x 65mm","offer_id":44054453616869,"sku":"BAA-FCSIIN-SQ65 (Baader #2961256)","price":552.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 1.25\"","offer_id":44054453649637,"sku":"BAA-FCSETN-1 (Baader #2961650)","price":609.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 2\"","offer_id":44054453682405,"sku":"BAA-FCSETN-2 (Baader #2961653)","price":1031.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 31mm","offer_id":44054453715173,"sku":"BAA-FCSETN-RD31 (Baader #2961651)","price":643.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 36mm","offer_id":44054453747941,"sku":"BAA-FCSETN-RD36 (Baader #2961652)","price":728.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 50mm","offer_id":44054453780709,"sku":"BAA-FCSETN-RD50 (Baader #2961654)","price":1174.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 50 x 50mm","offer_id":44054453813477,"sku":"BAA-FCSETN-SQ50 (Baader #2961655)","price":1251.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 65 x 65mm","offer_id":44054453846245,"sku":"BAA-FCSETN-SQ65 (Baader #2961656)","price":1589.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-6-5nm-narrowband-filters-cmos-optimized-h-alpha-o-iii-s-11-astronomy-plus.webp?v=1690490257"},{"product_id":"baader-3-5-4nm-f-3-ultra-highspeed-filters-cmos-optimized-h-alpha-o-iii-s-ii-1","title":"Baader 3.5 \/ 4nm f\/3 Ultra-Highspeed Filters – CMOS-optimized (H-alpha \/ O-III \/ S-II)","description":"\u003ch2\u003eBaader 3.5 \/ 4nm f\/3 Ultra-Highspeed Filters – CMOS-optimized (H-alpha \/ O-III \/ S-II)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBaader H-alpha \/ O-III \/ S-II f \/ 3 Ultra-Highspeed Filter Set - Premium Grade\u003c\/li\u003e\n\u003cli\u003e3.5 \/ 4 nm half width (to harmonize the exposure time of H-alpha with O-III \/ S-II), recommended for extremely fast optical systems from  f\/3.4 to f\/2.3\u003c\/li\u003e\n\u003cli\u003eSpecially designed for the special filter requirements when used with fast f\/3 optics\u003c\/li\u003e\n\u003cli\u003eEnables the highest contrast even with the strongest light pollution, minimizes the size of the stars, makes the finest nebula details accessible - indispensable under Bortle 9\/8\/7\/(6) sky\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker ™ hard-coated and optically polished - with sealed coating edges (Life-Coat ™)\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with a filter front indicator in the form of a black outer edge on the front\u003c\/li\u003e\n\u003cli\u003eOptimized for modern CMOS cameras, but ideally suited for CCD camera technologies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe new generation of Baader CMOS-optimized filters features:\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCMOS-Optimized Baader Filter\u003c\/li\u003e\n\u003cli\u003eIncreased contrast\u003c\/li\u003e\n\u003cli\u003eEver more narrow passbands\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1500.12px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" id=\"product-attribute-specs-table\" class=\"data-table\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid rgba(128, 128, 128, 0.16); box-shadow: rgba(128, 128, 128, 0.11) 0px 1px 4px; display: block; border-collapse: collapse; max-width: 100%; height: auto; overflow: auto; white-space: normal; background-color: #ffffff; width: 1500.12px; text-align: left; table-layout: fixed; color: #4c5154; font-family: 'Libre Franklin', sans-serif; font-size: 15px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eSUITABLE FOR F\/RATIO\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e\u0026lt; f\/2.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eH-alpha \/ O-III \/ S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 38px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 38px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003e\n\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e2 mm Thickness = 1.25\"\/ 2\" \/ 31mm \/ 36mm\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin-top: 0.9375rem; margin-bottom: 0.9375rem;\"\u003e3mm Thickness = 50.4mm \/ 50x50 \/ 65x65\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e3.5 nm (H-alpha) \/ 4 nm (O-III \/ S-II)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003e656,3 nm \/ 500,7 nm \/ 671,7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 38px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 38px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 38px;\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCMOS-optimized with\u003cspan style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e \u003c\/span\u003eLife-Coat™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMultiple\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eCMOS, CCD, H-alpha, O-III, S-II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eMounted (LPFC 6mm) \/ Unmounted \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003ef\/2 Ultra-Highspeed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 22.1875px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); height: 22.1875px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 22.1875px;\"\u003eSingles and Filter-Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); background: #eeeeee; height: 19px;\"\u003e\n\u003cth style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"label\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-weight: 600; border: 1px solid #aaaaaa; font-family: 'Libre Franklin', sans-serif; font-style: normal; font-size: var(--font-size-body); padding: 2px; text-align: left; color: #4c4c4c; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\" class=\"data\" data-mce-fragment=\"1\" data-mce-style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); border: 1px solid #aaaaaa; font-size: 13px; padding: 2px; width: 326.132px; overflow-wrap: break-word; margin-left: auto; margin-right: auto; height: 19px;\"\u003eround \/ square (depending on size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBaader 3.5 \/ 4nm f\/3 Ultra-Highspeed Filters\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBaader Limited Lifetime Warranty\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"H-alpha (3.5nm) \/ 1.25\"","offer_id":44054814359781,"sku":"BAA-FCHALMSU-1 (Baader #2961350)","price":417.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 2\"","offer_id":44054814392549,"sku":"BAA-FCHALMSU-2 (Baader #2961353)","price":597.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 31mm","offer_id":44054814425317,"sku":"BAA-FCHALMSU-RD31 (Baader #2961351)","price":439.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 36mm","offer_id":44054814458085,"sku":"BAA-FCHALMSU-RD36 (Baader #2961352)","price":526.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 50mm","offer_id":44054814490853,"sku":"BAA-FCHALMSU-RD50 (Baader #2961354)","price":651.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 50 x 50mm","offer_id":44054814523621,"sku":"BAA-FCHALMSU-SQ50 (Baader #2961355)","price":746.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha (3.5nm) \/ 65 x 65mm","offer_id":44054814556389,"sku":"BAA-FCHALMSU-SQ65 (Baader #2961356)","price":934.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 1.25\"","offer_id":44054814589157,"sku":"BAA-FCOIIIMSU-1 (Baader #2961425)","price":383.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 2\"","offer_id":44054814621925,"sku":"BAA-FCOIIIMSU-2 (Baader #2961428)","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 31mm","offer_id":44054814654693,"sku":"BAA-FCOIIIMSU-RD31 (Baader #2961426)","price":414.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 36mm","offer_id":44054814687461,"sku":"BAA-FCOIIIMSU-RD36 (Baader #2961427)","price":495.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 50mm","offer_id":44054814720229,"sku":"BAA-FCOIIIMSU-RD50 (Baader #2961429)","price":605.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 50 x 50mm","offer_id":44054814752997,"sku":"BAA-FCOIIIMSU-SQ50 (Baader #2961430)","price":619.0,"currency_code":"CAD","in_stock":true},{"title":"OIII (4nm) \/ 65 x 65mm","offer_id":44054814785765,"sku":"BAA-FCOIIIMSU-SQ65 (Baader #2961431)","price":823.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 1.25\"","offer_id":44054814818533,"sku":"BAA-FCSIIMSU-1 (Baader #2961500)","price":392.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 2\"","offer_id":44054814851301,"sku":"BAA-FCSIIMSU-2 (Baader #2961503)","price":567.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 31mm","offer_id":44054814884069,"sku":"BAA-FCSIIMSU-RD31 (Baader #2961501)","price":418.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 36mm","offer_id":44054814916837,"sku":"BAA-FCSIIMSU-RD36 (Baader #2961502)","price":501.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 50mm","offer_id":44054814949605,"sku":"BAA-FCSIIMSU-RD50 (Baader #2961504)","price":611.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 50 x 50mm","offer_id":44054814982373,"sku":"BAA-FCSIIMSU-SQ50 (Baader #2961505)","price":624.0,"currency_code":"CAD","in_stock":true},{"title":"SII (4nm) \/ 65 x 65mm","offer_id":44054815015141,"sku":"BAA-FCSIIMSU-SQ65 (Baader #2961531)","price":838.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 1.25\"","offer_id":44054815047909,"sku":"BAA-FCSETMSU-1 (Baader #2961640)","price":1130.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 2\"","offer_id":44054815080677,"sku":"BAA-FCSETMSU-2 (Baader #2961643)","price":1641.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 31mm","offer_id":44054815113445,"sku":"BAA-FCSETMSU-RD31 (Baader #2961641)","price":1203.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 36mm","offer_id":44054815146213,"sku":"BAA-FCSETMSU-RD36 (Baader #2961642)","price":1445.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 50mm","offer_id":44054815178981,"sku":"BAA-FCSETMSU-RD50 (Baader #2961644)","price":1774.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 50 x 50mm","offer_id":44054815211749,"sku":"BAA-FCSETMSU-SQ50 (Baader #2961645)","price":1892.0,"currency_code":"CAD","in_stock":true},{"title":"Filterset \/ 65 x 65mm","offer_id":44054815244517,"sku":"BAA-FCSETMSU-SQ65 (Baader #2961646)","price":2457.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-3-5-4nm-f3-ultra-highspeed-filters-cmos-optimized-h-alpha-o-iii-s-ii-astronomy-plus_f2dbd5d6-11e7-4e62-af52-5d8300dc18f7.webp?v=1690490257"},{"product_id":"kowa-high-lander-21x-wide-angle-eyepiece-te-21wh-1","title":"Kowa High Lander 21x Wide Angle Eyepiece (TE-21WH)","description":"\u003ch2\u003e21x wide angle eyepiece for use with the Kowa High Lander large binocular\u003c\/h2\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003cul\u003e\n\u003cli\u003eInterchangeable eyepiece(s) for High Lander large binoculars \u003c\/li\u003e\n\u003cli\u003e21x magnification\u003c\/li\u003e\n\u003cli\u003eLarge field of view\u003c\/li\u003e\n\u003cli\u003eEyeglass wearer-friendly twist-up eyecups\u003c\/li\u003e\n\u003cli\u003eOptional digiscoping solutions available for smartphone and system cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003ctable class=\"product--properties-table\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eEye Relief:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e17.0mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eReal Field of View (degree):\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eMagnification:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e21x Wide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eExit Pupil Diameter:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e3.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eRelative Brightness:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e15.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eTwilight Factor:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e41.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"product--properties-row\"\u003e\n\u003ctd class=\"product--properties-label is--bold\"\u003eField of view at 1000m\/yds:\u003c\/td\u003e\n\u003ctd class=\"product--properties-value\"\u003e52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cdiv class=\"tab--content--inner\"\u003e\n\u003cul\u003e\n\u003cli\u003e(1) 21x wide angle eyepiece\u003c\/li\u003e\n\u003cli\u003eObjective lens caps\u003c\/li\u003e\n\u003cli\u003eEyepiece caps\u003c\/li\u003e\n\u003cli\u003eInstruction manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e All Kowa branded sporting optics products come with a 10 year warranty.\u003c\/p\u003e","brand":"Kowa","offers":[{"title":"Default Title","offer_id":44054858399973,"sku":"KOW-TE-21WH","price":839.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/kowa-high-lander-21x-wide-angle-eyepiece-te-21wh-astronomy-plus.webp?v=1690490256"},{"product_id":"svbony-2-sho-filter-set-h-alpha-oiii-sii-7nm-f9169b-w9121b-w9122b","title":"SVBONY 2\" SHO Filter Set H-Alpha OIII SII 7nm (F9169B-W9121B-W9122B)","description":"\u003ch2\u003eSVBONY 2\" SHO Filter Set H-Alpha OIII SII 7nm\u003c\/h2\u003e\n\u003cdiv id=\"tab4\"\u003e\n\u003cp\u003e1. The H-Alpha 7nm is an extremely narrow emission-line filter that works by allowing a 7nm bandwidth of light, centered on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are responsible for natural light pollution, or skyglow, are drastically reduced, as is artificial light pollution caused by high and low pressure sodium vapor and mercury vapor lights. The result is a high contrast image that reveals the H-alpha line in all its glory\u003c\/p\u003e\n\u003cp\u003e2. The Sulfur II 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). Like all SVBONY filters that are designated as “CCD”, this SII filter also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter\u003c\/p\u003e\n\u003cp\u003e3. The Oxygen III 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 500nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). Like all SVBONY filters that are designated as “CCD”, this OIII also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; margin-left: auto; margin-right: auto;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eF9169B\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eW9121B\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eW9122B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eSpec\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eH-Alpha 7nm\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eOIII 7nm\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eSII 7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eTransmission Line Wavelength\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e656nm\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e500nm\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e672nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eM48*0.75\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eM48*0.75\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eM48*0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eH-Alpha 7nm 2\" filter\u003c\/li\u003e\n\u003cli\u003eOIII 7nm 2\" filter\u003c\/li\u003e\n\u003cli\u003eSII 7nm 2\" filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44092533276901,"sku":"SVB-F9169B-W9121B-W9122B","price":625.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-2-sho-filter-set-h-alpha-oiii-sii-7nm-f9169b-w9121b-w9122b-astronomy-plus.webp?v=1690490599"},{"product_id":"sv160-2-sii-filter-7nm-narrow-band-for-ccds-w9122b","title":"SVBONY SV160 2\" SII Filter 7nm Narrow-Band for CCDs (W9122B)","description":"\u003ch2\u003eSVBONY SV160 2\" SII Filter 7nm Narrow-Band for CCDs \u003c\/h2\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eSVBONY Sulfur II 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions; including wavelengths of light that are responsible for light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eQuality lens material;The SVBONY 2inch filters are made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength or CWL\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eRugged metal frame;The SVBONY filter cell is made of lightweight; strong metal and is CNC machined; sand-blasted; black anodized; and then laser engraved\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eStandard 2-inch thread size; Metal filter cell threads directly into the 2- inch barrel of your telescope eyepiece\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eSVBONY 2inch SII-CCD filter is for the astrophotography; lets you increase the contrast when photographing deep sky objects; It stands out better against the night sky background; letting you see detail that was not apparent before\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eThe Sulfur II 7nm Extra Narrowband Filter transmits a 7nm bandwidth of light that is centered at 672nm and drastically reduces other transmissions, including wavelengths of light that are responsible for light pollution (both artificial and natural). Like all SVBONY filters that are designated as “CCD”, this SII filter also blocks infrared wavelengths from 700nm to 1100nm so you don't need a separate IR-Cut filter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eThin metal cells have a clear aperture of 45mm for 2inch filters,each filter comes with a plastic case with high pressure EVA case lining\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMade with Schoot glass\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003cspan\u003e \u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eW9122B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e2''\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eSII filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003etransmission SII\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e80% at 672nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eInfrared wavelength\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e700-1100nm cut-off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003etransmission Hg\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e0.1% at 435nm and 578nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003etransmission Na\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e0.1% at 589nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eThickness​\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e1.85mm​\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44096073695461,"sku":"SVB-W9122B","price":212.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-sv160-2-sii-filter-7nm-narrow-band-for-ccds-w9122b-astronomy-plus-1.png?v=1690490612"},{"product_id":"svbony-sv132-1-25-h-beta-25nm-light-pollution-filter","title":"SVBONY SV132 1.25'' H-Beta 25nm Light Pollution Filter (W9102A)","description":"\u003ch2\u003eSVBONY SV132 1.25'' H-Beta 25nm Light Pollution Filter\u003c\/h2\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eSV132 H-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies;Great used with a moderate to large aperture telescope and clear dark skies\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eOptical high precision double side polishing; Filter substrate is fine-optically polished to 1\/4 wave and \u0026lt;30 parallelism over both surfaces; Avoid halos\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003ePrecision double-sided optical coatings improve transmission and cut-off depth; Executes with a transmission of over 90% and completely rejects light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eHigh value transmission of pass-band and optical density of off-band is assured through planetary rotation system, a homogenous and precise coating procedure; The high optical quality of SV132 filters guarantees no loss in sharpness or contrast\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eFilter with metal mount 1.25\" filter threads; Threaded to fit 1.25\" eyepieces and threaded diagonal barrels\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"a-list-item\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6372991326672431911273645_480x480.jpg?v=1686151004\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1. Each Svbony filter has an ultra hard, vacuum-deposited coating carefully designed to observe the Orion Horsehead Nebula and the California Nebula, which are difficult to capture. This eliminates the un-natural colored halos surrounding bright stars common with H-Beta filters of less sophisticated coating technology\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2. The 1.25'' Svbony H-Beta filters suitable for viewing bright nebulae, and matching with large-aperture telescopes to observe linear spectrum nebulae,such as the M42 Orion Nebula under severe light pollution, emission nebulae, planetary stars \u0026amp; supernova remnants\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e3. Suitable for viewing on the faint and elusive Horsehead Nebula and California Nebula\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan class=\"a-list-item\"\u003eTechnical Specifications \u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 535px; box-sizing: border-box; border-spacing: 0px; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\" width=\"128\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\" height=\"294\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 48pt;\" span=\"2\" width=\"64\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 15.75pt; box-sizing: border-box;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; width: 307.344px; box-sizing: border-box; text-align: center;\" class=\"xl63\" height=\"21\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003eW9102A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eSize \u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e1.25''\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eThread Size\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003eM28.5*0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eBlocking area\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eTransmittance\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e80% at 486nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 45.75pt;\" height=\"61\"\u003e\n\u003ctd style=\"height: 45.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"61\"\u003eTransmission Hg\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e0.1% at 435nm and 578nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 23.25pt;\" height=\"31\"\u003e\n\u003ctd style=\"height: 23.25pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"31\"\u003eTransmission Na\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e0.1% at 589nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e25±3nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 15.75pt;\" height=\"21\"\u003e\n\u003ctd style=\"height: 15.75pt; border-top: none; width: 306.344px; text-align: center;\" class=\"xl63\" height=\"21\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"border-top: none; border-left: none; width: 226.656px; box-sizing: border-box; text-align: center;\" class=\"xl63\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box \u003c\/h3\u003e\n\u003cp\u003e1.25'' H-Beta 25nm Light Pollution Filter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44097115619557,"sku":"SVB-W9102A","price":72.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-sv132-1-25-h-beta-25nm-light-pollution-filter-w9102a-astronomy-plus-1.png?v=1690490612"},{"product_id":"svbony-sv115-2-inch-svbony-oiii-filter-18nm-f9186b","title":"SVBONY SV115 2 inch OIII Filter 18nm, Reducing Light Pollution (F9186B)","description":"\u003ch1\u003eSVBONY SV115 2 inch OIII Filter 18nm Reducing Light Pollution\u003c\/h1\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eThe O-III filter completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized;increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eThe filter made from high-grade glass with dichroic interference and antireflection coatings;not only useful at light-polluted sites; the contrast is also increased at dark sky sites;it can be used with all 2\" eyepieces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness;in many cases, they increase the contrast between nebula and night sky, not brightening the nebula\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eThe 2\" O-III filter useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming. Allowing just for the Double Ionized Oxygen lines between 495.9nm to 500.7nm to pass through at 90%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eAstrophotographic;The filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; 2\" filter allows high-contrast imaging even in areas with strong light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1. Narrowband OIII filter is designed for nebula observation allowing 18nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission lines, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eSvbony narrowband OIII filter suitable for visual  observation on most emission nebulae, planetary nebulae and supermova surfaces\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eSuitable for viewing on bright nebulae like M42 Orion Nebula in heavy light pollution\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eUse with a large aperture telescope under clear and dark viewing conditions with good seeing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object's brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eModel \u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eF9186B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1.25'' 18nm O-III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eBlocking area\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eTransmittance\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e90% at 495.9nm and 500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e18±2nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_443e2f07-aef5-4e49-90f8-b00183240471.jpg?v=1760119058\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSvbony SV115 2 inch Svbony OIII Filter 18nm  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44097620443365,"sku":"SVB-F9186B","price":98.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-sv115-2-inch-oiii-filter-18nm-reducing-light-polution-f9186b-astronomy-plus-1.jpg?v=1690490671"},{"product_id":"svbony-sv115-oiii-filter-narrowband-cuts-light-pollution-1-25-inch-18nm-f9186a","title":"SVBONY SV115 1.25 inch OIII Filter Narrowband 18nm, Cuts Light Pollution (F9186A)","description":"\u003cdiv\u003e\n\u003ch2 class=\"product-single__title\"\u003eSVBONY SV115 1.25 inch OIII Filter Narrowband 18nm, Cuts Light Pollution \u003c\/h2\u003e\n\u003c\/div\u003e\n\u003cul data-mce-fragment=\"1\" class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003eThe 1.25\" O-III filter useful for large aperture telescopes through which the light of the Moon can be extremely overwhelming. Allowing just for the Double Ionized Oxygen lines between 495.9nm to 500.7nm to pass through at 90%\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003eAstrophotographic;The filter enhances contrast during visual observation of gaseous and planetary nebulae in all sky conditions; 1.25\" filter allows high-contrast imaging even in areas with strong light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003eThe filter made from high-grade glass with dichroic interference and antireflection coatings;not only useful at light-polluted sites; the contrast is also increased at dark sky sites;it can be used with all 1.25\" eyepieces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003eThe O-III filter completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized;increases contrast through selective filtration-Anti-reflection coated to prevent glaring and ghosting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003eNarrowband filter do not eliminate the effects of light pollution or increase the object’s brightness;in many cases, they increase the contrast between nebula and night sky, not brightening the nebula\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" class=\"a-list-item\"\u003e\u003cimg height=\"221\" width=\"550\" style=\"display: block; margin-left: auto; margin-right: auto;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6372999962820620812992847_480x480.jpg?v=1686234045\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"tabs-listing\"\u003e\n\u003cdiv class=\"tab-container\"\u003e\n\u003cdiv id=\"tab4\" class=\"tab-content\"\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSvbony narrowband OIII filter suitable for visual  observation on most emission nebulae, planetary nebulae and supermova surfaces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSuitable for viewing on bright nebulae like M42 Orion Nebula in heavy light pollution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eUse with a large aperture telescope under clear and dark viewing conditions with good seeing\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eF9186A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1.25'' 18nm O-III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eBlocking area\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e400-700nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eTransmittance\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e90% at 495.9nm and 500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e18±2nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eThickness\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1.25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp class=\"product-single__title\"\u003eSVBONY SV115 OIII Filter Narrowband 1.25 inch 18nm\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" data-mce-href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":44098681340133,"sku":"SVB-F9186A","price":64.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-sv115-1-25-inch-oiii-filter-narrowband-18nm-cuts-light-pollution-f9186a-astronomy-plus-1.jpg?v=1690490671"},{"product_id":"antlia-2-5nm-sho-ultra-filter-2-mounted","title":"Antlia 2.5nm SHO Ultra Narrowband Filters 2’’ \u0026 36mm","description":"\u003ch1\u003eAntlia 2.5nm SHO Ultra Filter 2’’ \u0026amp; 36mm\u003c\/h1\u003e\n\u003cp\u003eThe Antlia SHO 2.5nm Ultra series filters are made with quartz glass and undergo precisely controlled coating processes to ensure optimal performance. The 2.5nm Ultra series is designed with a FWHM (full width half maximum) of 2.5nm +0.3\/-0.1nm and a transmission efficiency \u0026gt;93-95% at the Central Wavelength.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eThe quartz glass possesses an ultra-low thermal expansion coefficient with outstanding thermal and mechanical properties. When combined with advanced coating processes, these filters exhibit remarkable durability for imaging and research in the most challenging environmental conditions.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eCompared to the 3nm Pro series, the 2.5nm Ultra series coated on quartz glass exhibits higher transmittance with Ha\/SII≥95% and OIII≥93%. These filters are estimated to improve signal by 20-30% in your images. Additionally, the Ultra series boasts a narrower FWHM of 2.5nm+0.3\/-0.1nm, resulting in an exceptionally high Signal to Noise Ratio for deep sky photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe main features and application:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e- High transmittance （Ha\/SII≥95%，OIII≥93%）and the narrow FWHM 2.5nm +0.3\/-0.1nm to maximize contrast;\u003c\/li\u003e\n\u003cli\u003e- Flat-top spectrum minimizes the loss in transmission due to the Center Wavelength (CWL)-shift;\u003c\/li\u003e\n\u003cli\u003e- Out of band blocking specification is designed to OD5 (0.001%) to block interference from other wavelengths and minimize halos around bright stars;\u003c\/li\u003e\n\u003cli\u003e- Made of quartz glass, excellent durability and thermal stability, better fracture resistance and scratch resistance, improved coating resilience to cleaning;\u003c\/li\u003e\n\u003cli\u003e- Filters are resistant to scratches；\u003c\/li\u003e\n\u003cli\u003e- Identical filter thickness to existing standards and double-sided fine polishing , with utmost care for parfocality;\u003c\/li\u003e\n\u003cli\u003e- The SHO 2.5nm Ultra filters are recommended for use in optics with a Focus Ratio of ≥ f\/3.5 for best optical performance;\u003c\/li\u003e\n\u003cli\u003e- 100% of production are scanned individually, all transmission and blocking (OD) data in the box are actual, measured spectra and transmission；\u003c\/li\u003e\n\u003cli\u003e- All Antlia filters are coated to the edge of the substrate and unmounted narrowband filters are edge blackened to eliminate internal reflections from stray light；\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAntlia standard ring: 2’’(M48*0.75)\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSolar imaging\u003c\/p\u003e\n\u003cp\u003eNight visual observation\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot Permitted:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/p\u003e\n\u003cp\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum Curves:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-size-adjust: 100%; margin: 0px 0px 1px; color: #666666; font-family: 微软雅黑; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cspan style=\"text-size-adjust: 100%; font-size: 13px; font-family: Arial;\"\u003e\u003c\/span\u003e\u003cimg style=\"text-size-adjust: 100%; border: 0px; vertical-align: top; max-width: 100%; height: auto !important;\" class=\"need_fix\" alt=\"Ha 2.5nm ultra.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgg_S1owYo3c-58wQwwQo4-wU.jpg\" width=\"1345\" height=\"767\"\u003e\u003cimg style=\"text-size-adjust: 100%; border: 0px; vertical-align: top; max-width: 100%; height: auto !important;\" class=\"need_fix\" alt=\"OIII 2.5nm ultra.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgg_S1owYorqjy_wEwwQo4-wU.jpg\" width=\"1345\" height=\"767\"\u003e\u003cimg style=\"text-size-adjust: 100%; border: 0px; vertical-align: top; max-width: 100%; height: auto !important;\" class=\"need_fix\" alt=\"SII 2.5nm ultra.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgg_S1owYoxoH3HjDDCjiABg.jpg\" width=\"1347\" height=\"768\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; font-family: Calibri; font-size: 11pt; color: #000; background-color: transparent;\" 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cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: nowrap; text-align: left; vertical-align: top; border-right: 1px solid #000000; border-left: 1px solid #000000; border-top: 1px solid #000000;\"\u003e\u003cspan style=\"font-family: Times New Roman; font-size: 10pt; vertical-align: baseline;\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eHydrogen-alpha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eSulfur-II\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eOxygen III\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: nowrap; vertical-align: bottom; border-right: 1px solid #000000;\"\u003e\u003cspan style=\"vertical-align: baseline;\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border-right: 1px solid #000000; border-bottom: 1px solid #000000; border-left: 1px solid #000000;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eFWHM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e2.5nm +0.3\/-0.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e2.5nm +0.3\/-0.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e2.5nm +0.3\/-0.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 51pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e656.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e672.4nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e500.7nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003ePeak Transmission\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e95%\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e95%\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e93%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eBlocking\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 143.1818181818182pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\" rowspan=\"1\" colspan=\"3\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e≥OD5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 47.727272727272734pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eFilter Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 143.1818181818182pt; white-space: normal; text-align: center; vertical-align: top; border: 1px solid #000000;\" rowspan=\"1\" colspan=\"3\"\u003e\u003cspan style=\"color: #4b4b4b; font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSelected Filters\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"value\"\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAntlia 3-Years Warranty against Delamination\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"H-alpha \/ 2\"","offer_id":44108918751461,"sku":"AF-HA-ULTRA25-2","price":837.0,"currency_code":"CAD","in_stock":true},{"title":"H-alpha \/ 36mm","offer_id":46326660071653,"sku":"AF-HA-ULTRA25-36","price":660.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur-II \/ 2\"","offer_id":44108918784229,"sku":"AF-SII-ULTRA25-2","price":837.0,"currency_code":"CAD","in_stock":true},{"title":"Sulfur-II \/ 36mm","offer_id":46326660104421,"sku":"AF-SII-ULTRA25-36","price":660.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 2\"","offer_id":44108918816997,"sku":"AF-OIII-ULTRA25-2","price":837.0,"currency_code":"CAD","in_stock":true},{"title":"Oxygen III \/ 36mm","offer_id":46326660137189,"sku":"AF-OIII-ULTRA25-36","price":660.0,"currency_code":"CAD","in_stock":true},{"title":"SHO Filter Set \/ 2\"","offer_id":44108918882533,"sku":"AF-SHO-ULTRA25-2","price":2511.0,"currency_code":"CAD","in_stock":true},{"title":"SHO Filter Set \/ 36mm","offer_id":46326660169957,"sku":"AF-SHO-ULTRA25-36","price":1980.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-2-5nm-sho-ultra-narrowband-filters-2-mounted-astronomy-plus.webp?v=1690491120"},{"product_id":"solex-optical-kit","title":"Shelyak SOL'EX Optical Kit [New Genl] (ES0036)","description":"\u003cdiv class=\"et_pb_module et_pb_wc_title et_pb_wc_title_0 et_pb_bg_layout_light\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003ch1\u003eShelyak SOL’EX OPTICAL KIT \u003c\/h1\u003e\n\u003cdiv class=\"et_pb_module et_pb_wc_description et_pb_wc_description_0 et_pb_bg_layout_light  et_pb_text_align_left\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003cp\u003eWith\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSol’Ex\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e\u003cem\u003eSolar Explorer\u003c\/em\u003e\u003c\/strong\u003e), build your own 3D-printed solar imaging instrument.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note: this kit contains only the optical elements\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(see Composition tab). You’ll also need to source the 3D-printed parts and other components (cameras, accessories, etc.).\u003c\/p\u003e\n\u003cp\u003eWith Sol’Ex (\u003cstrong\u003e\u003cem\u003eSolar Explorer\u003c\/em\u003e\u003c\/strong\u003e), make incredible images of the Sun, as if you had a particularly narrow filter (typically 0.3 Ångström), much narrower than any commercially available filter, which will produce high-contrast views of the chromosphere. You can also choose the wavelength of your image (H-alpha, H-beta, sodium, helium, calcium… the entire visible range is accessible).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"et_pb_module et_pb_wc_price et_pb_wc_price_0\"\u003e\n\u003cdiv class=\"et_pb_module_inner\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003cimg height=\"289\" width=\"576\" style=\"display: block; margin-left: auto; margin-right: auto;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/protuberance_2-980x492_1_480x480.jpg?v=1687544230\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSol’Ex project\u003c\/strong\u003e\u003cstrong\u003e:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSol’Ex is a small self-built instrument with 3D-printed parts. The project was proposed and led by Christian Buil. The Sol’Ex project\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.astrosurf.com\/solex\/\" rel=\"noopener\" target=\"_blank\"\u003ewebsite\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003egives all the practical details for installation and use in the field. Sol’Ex should be mounted on a small telescope (with a focal length of 450mm max), to see the whole Sun in a single image, but a longer focal length is possible and will give more detailed images of portions of the disk. This project includes automatic image processing software: the result appears on the screen in just a few clicks. Sol’Ex works on the principle of a spectroheliograph: the image is built up line by line by scanning the image of the Sun (it’s the same principle as a photocopier, except that in this case the copy is an image of the Sun).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSol’Ex optical kit\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoffered by Shelyak includes all the optical components needed to build the instrument: slit, grating, lenses, etc. You’ll need to source the parts independently in 3D printing, or build them yourself if you have a printer (STL files available on the Sol’Ex website). Find out more about the Sol’Ex \u0026amp; Star’Ex project in\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.shelyak.com\/solex-starex-a-new-way-to-approach-astronomy\/?lang=en\" rel=\"noopener\" target=\"_blank\"\u003ethis article\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGoing further… :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOnce you’ve familiarized yourself with Sol’Ex, you’ll understand that this instrument can also be turned towards (other) stars. Sol’Ex was then transformed into Star’Ex (\u003cstrong\u003e\u003cem\u003eStar Explorer\u003c\/em\u003e\u003c\/strong\u003e), a small Very High Resolution (VHR) spectrograph. A few additional optical elements are needed to transform a Sol’Ex into a Star’Ex. This is the purpose of the complementary optical kit (\u003ca href=\"https:\/\/www.shelyak.com\/?post_type=product\u0026amp;p=10392\u0026amp;lang=en\" rel=\"noopener\" target=\"_blank\"\u003eES0030 – Star’Ex HR complementary kit\u003c\/a\u003e). You can also opt now for the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.shelyak.com\/?post_type=product\u0026amp;p=10392\u0026amp;lang=en\" rel=\"noopener\" target=\"_blank\"\u003eStar’Ex High Resolution optical kit\u003c\/a\u003e, which contains all the components needed to make a Sol’Ex, then transform it into a Star’Ex HR.\u003c\/p\u003e\n\u003cp\u003e \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eApplications :\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWith the Sol’Ex, you can not only take magnificent images of the sun, but also study sunspots and protuberances on the sun’s surface, tracking their evolution over time.\u003c\/li\u003e\n\u003cli\u003eThe resolution is such that you can even measure movements on the Sun’s surface (and its rotation) using the Doppler effect.\u003c\/li\u003e\n\u003cli\u003eThe fact of assembling and adjusting the instrument yourself allows you to fully understand its optical operation; It’s simple and very educational. So much so, in fact, that Sol’Ex has its place in schools and universities, as well as in astronomy and popular science associations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eResolution at 650 nm with 10 micron slit width: 0.03 nm\u003c\/li\u003e\n\u003cli\u003eWavelength range: 400 nm – 700 nm\u003c\/li\u003e\n\u003cli\u003eInternal reduction ratio: 125:80\u003c\/li\u003e\n\u003cli\u003e10µm slit for maximum resolution (Sol’Ex), or 15, 19, 23 or 35µm slit depending on your telescope (Star’Ex)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese technical specifications apply to the Sol’Ex instrument once assembled (and not to the optical kit).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e[OP0176] Collimator doublet with a diameter of 25.4 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 80 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0181] Double objectif lens with a diameter of 25.4 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 125 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0177]\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2400 gr\/mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eholographic grating, 25 x 25 mm\u003c\/li\u003e\n\u003cli\u003e[SE0289] A GEN 2 reflective slit with two positions,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e7 and 10 µm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewide and 6 mm long\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eShelyak 1-Year Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.shelyak.com\/solex-starex\/\"\u003eArticles detailing the Sol’Ex \u0026amp; Star’Ex project\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.astrosurf.com\/solex\/sol-ex-presentation-en.html\" target=\"_blank\"\u003eSol’Ex project website\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44118798663909,"sku":"SHE-ES0036","price":637.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/detail-kit-SolExV2.webp?v=1773517416"},{"product_id":"shelyak-starex-high-resolution-optical-kit","title":"Shelyak Star'ex High Resolution Optical Kit New Gen(ES0038)","description":"\u003ch1\u003eShelyak Star'ex high Resolution Optical Kit \u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eWith \u003c\/span\u003e\u003cstrong\u003eStar’Ex\u003c\/strong\u003e\u003cspan\u003e (\u003c\/span\u003e\u003cem\u003e\u003cstrong\u003eStar’Explorer\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e), build your first High Resolution (HR) spectrograph to observe the spectrum of stars and other sky objects (nebulae, galaxies, planets, etc.)! \u003c\/span\u003e\u003cstrong\u003ePlease note: this kit contains only the optical components\u003c\/strong\u003e\u003cspan\u003e (see Composition tab). You’ll also need to purchase the 3D-printed parts and other components (cameras, accessories, etc.). \u003c\/span\u003e\u003cstrong\u003eThe Star’Ex project:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eStar’Ex is a project proposed by Christian Buil, following on from \u003c\/span\u003e\u003ca href=\"https:\/\/www.shelyak.com\/?post_type=product\u0026amp;p=10017\u0026amp;preview=true\"\u003eSol’Ex\u003c\/a\u003e\u003cspan\u003e. A \u003c\/span\u003e\u003ca rel=\"noopener\" href=\"http:\/\/www.astrosurf.com\/solex\/\" target=\"_blank\"\u003ededicated site\u003c\/a\u003e\u003cspan\u003e gives you all the information you need to assemble and operate this instrument. You make the parts using 3D printing (or have them made by a specialist), then assemble the instrument with the optical elements from this kit. All the optical elements necessary to make a Star’Ex HR are included in this kit: slit, grating, lenses, guide elements, etc. En outre, un dispositif haute-performance offre plusieurs largeurs de fente « fente large » pour adopter la configuration Star’Ex à la taille de votre télescope et à la résolution spectrale souhaitée. \u003c\/span\u003e\u003cstrong\u003eNote\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: avec ce kit optique, vous avez également tous les éléments nécessaires pour \u003c\/span\u003e\u003cstrong\u003eréaliser un Sol’Ex\u003c\/strong\u003e\u003cspan\u003e (nous vous recommandons de commencer par faire un Sol’Ex : ce serait dommage de se priver de merveilleuses images du Soleil !). Find out more about the Sol’Ex \u0026amp; Star’Ex project \u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.shelyak.com\/solex-starex-a-new-way-to-approach-astronomy\/?lang=en\" target=\"_blank\"\u003ehere.\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAlready have a Sol’Ex?\u003c\/strong\u003e\u003cspan\u003e Just buy the Star’Ex HR optical add-on kit and turn your Sol’Ex into a Star’Ex. \u003c\/span\u003e\u003cstrong\u003eExample of a spectrum obtained with the Star’Ex HR:\u003c\/strong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/spectres_Acuter_60mm-980x742_480x480.jpg?v=1687545397\" alt=\"\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"543\" height=\"411\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith modest equipment (small telescope, small CMOS camera), you can produce very high resolution spectra on shiny objects, i.e. see minute details in the profile of an absorption or emission ray. You’ll also be able to measure radial velocities using the Doppler effect, see changes in the profile of a particular line, highlight a companion of a binary star, and even measure a magnetic field by adding a light polarization system as described in \u003c\/span\u003e\u003ca href=\"https:\/\/www.shelyak.com\/spectropolarimetry-or-how-to-observe-the-magnetic-field-of-a-star-with-a-72mm-telescope-and-a-3d-printed-spectrograph\/?lang=en\"\u003eGuillaume Bertrand’s article\u003c\/a\u003e\u003cspan\u003e. If you’re upgrading to a larger-diameter telescope, you’ll need to adjust the slot width to suit your telescope’s focal length, using the 4-position slot supplied with this kit. The longer the focal length, the wider the slit. A larger telescope will enable you to obtain fainter object spectra. \u003c\/span\u003e\u003cstrong\u003eNote:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003ewhen you work at high resolution, the light flux reaching the sensor is widely dispersed, so you’re limited to making targets of bright objects. To produce spectra of fainter objects, you can use the\u003c\/span\u003e\u003ca rel=\"noopener\" href=\"https:\/\/www.shelyak.com\/?post_type=product\u0026amp;p=10393\u0026amp;lang=en\" target=\"_blank\"\u003e\u003cspan\u003e \u003c\/span\u003elow-resolution (BR) version of the Star’Ex\u003c\/a\u003e\u003cspan\u003e, which will enable you to produce targets such as galaxies or quasars, but with the whole visible range in one go, spectro is always a matter of compromise.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSpectral resolution: R = 700 to R = 30,000 depending on the slit width chosen (R = wavelength \/ spectral finesse)\u003c\/li\u003e\n\u003cli\u003eWavelength range: 400 nm – 700 nm\u003c\/li\u003e\n\u003cli\u003eInternal reduction ratio: 125 : 80\u003c\/li\u003e\n\u003cli\u003e10µm slit for maximum resolution, or 15, 19, 23 or 35µm slit, depending on your telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e \u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eKit Star’Ex HR\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRef : [ES0038]\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eFor the Sol’ex part :\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e[OP0176] Collimator doublet with a diameter of 25.4 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 80 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0181] Double objectif lens with a diameter of 25.4 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 125 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0177]\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2400 gr\/mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eholographic grating, 25 x 25 mm\u003c\/li\u003e\n\u003cli\u003e[SE0289] A reflective GEN 2 slit with two positions,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e7 and 10 µm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewide and 6 mm long\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eFor guidance \/ Star’Ex\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e[OP0080] Two doublets with a diameter of 12.5 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 50 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0010]\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e15x15mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emirror, 3mm thick\u003c\/li\u003e\n\u003cli\u003e[SE0288] GEN 2 multi-width slit with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4 positions of 14\/20\/26\/32 µm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eStar’Ex HR complementary optical kit\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eRef : [ES0037]\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e[OP0080] Two doublets with a diameter of 12.5 mm and a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efocal length of 50 mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e[OP0010]\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e15x15mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emirror, 3mm thick\u003c\/li\u003e\n\u003cli\u003e[SE0288] GEN 2 multi-width slit with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4 positions of 14\/20\/26\/32 µm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eShelyak 1-Year Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.shelyak.com\/solex-starex\/\"\u003eArticles detailing the Sol’Ex \u0026amp; Star’Ex project\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.astrosurf.com\/solex\/sol-ex-presentation-en.html\" target=\"_blank\"\u003eSol’Ex project website\u003c\/a\u003e\u003c\/p\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44118811640037,"sku":"SHE-ES0038","price":808.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Detail-kit-StarExV2.webp?v=1773518485"},{"product_id":"astronomik-oiii-12nm-maxfr-ccd-filter","title":"Astronomik OIII 12nm MaxFR CCD Filter","description":"\u003ch2\u003eAstronomik OIII 12nm MaxFR CCD Filter\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThere is an ever growing demand for filters suitable for extremly fast optical systems like\u003cspan\u003e \u003c\/span\u003eCelestron´s\u003cspan\u003e \u003c\/span\u003eRASA the Epsilon Astrographs made by Takahashi.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfect matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eextremly high contrast\u003c\/strong\u003e, minimized stray light,\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003eno halos\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to a awesome final image!\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFor 12nm MaxFR filters this means a unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003cbr\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFor 6nm MaxFR filters this means a unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor maximum contrast the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr\u003eIf you have to observe from light polluted sites (like most of us...), imaging with narrowband-emissionline filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normaly an H-alpha filter should be your first step into this amazing field of astrophotography! With an Narrowband H-alpha filter you will be able to take deep and contrasty images even wih very heavy light pollution or with the full moon high up in the sky!\u003cbr\u003eIf you look at other astrophotos, an H-alpha is the best choice for all nebulas glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulas and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQuality aspects of the new Astronomik MFR narrowband-emissionline filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFR Coating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Quality substrate:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAstronomik filters are made with stress- and striae free, opticaly polished glass. The filter itself is made of ultra thin layers on this substrate!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParfocal filters:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll Astronomik Filters are parfocal! Due to the very small thickness-tolerance the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAstronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as a Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurability\u003c\/strong\u003e: Due to our coating technique all Astronomik filters are highly scratch resistant, not sensitive to moisture and do not degrade when getting older. Every Astronomik filter will deliver it´s full perfomance and meet the specs at the point of shipping even after lot´s of years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegated Blocking:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAll unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additonal UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emissionline filters with  coating!)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide range of available sizes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efrom 1,25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli\u003eDelivered in a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDue to our outstandding coating technique we do offer a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10 year guarantee\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eon all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especialy the filters against ligh pollution and the narrowband-emissionline filters will expand your imaging possibilities enormous! You are investing your money for an accessory which will work in lot´s of years in the same ways it did when it was brand new. Due to our special coating technique the filters do not degraed when getting older, and due to the new MFR coating you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTypicall questions asked by customers looking for Narrowband-Emissionline Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe question which full-width-half-maximum (FWHM) is the \"best\", shows up on in eMails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr\u003eIf you have a camera with an extremly low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background you will be able to expose longer and get deeper images! All stars are very tiny points, most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the milkyway!\u003cbr\u003eTo put it short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr\u003e6nm filters are the best choice for observing sites with extrem strong light pollution, cameras with low dark-current and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis question is asked quite often, and the answer is very easy: You don have to expose longer, but you MAY expose longer!\u003cbr\u003eDue to the high transmission of approximately 100% at the center wavelength nearly all emission line photons reach the sensor. So the number of for example \"H-alpha-photons\" does not change significant wether a H-alpha filter is installed or not. But looking at the photons of other wavelength, which wi do NOT want to record makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do an exposure of 30sec without any filters from a lightpolluted urban observing site, your sky-background might be allready very, very bright or even saturated. The same image taken with an Narrowband-Emissionline filter will give you a perfect black background without any signal and the signal from the object will be about the same. With this black background you have the possibility to expose longer -propably 30min instead- to record fainter structures! So itś not a \"must\", it´s a \"can\".\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e_________________________\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003eAll  Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eEach and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003e\u003cbr\u003eOn the back of each filter-box you will find a label that details the precise sensitivity and band pass measurements for that individual filter inside the box: You will see the max transmission and the recommended range of focal ratio were the filter will give you the best performance.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003e_________________________\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch3 style=\"text-align: left;\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul style=\"text-align: left;\"\u003e\n\u003cli\u003eSelected frame size Astronomik 12nm MaxFR CCD Filter\u003c\/li\u003e\n\u003cli\u003ePlastic Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: left;\" class=\"tab__content tab.box tab__content--active\" data-content=\"tab-3\" aria-labelledby=\"tab-title-3\" aria-hidden=\"false\" role=\"tabpanel\"\u003e\n\u003cbr\u003e\u003cspan\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\" data-mce-href=\"https:\/\/www.astronomik.com\/en\/warranty-garantie.html\"\u003eAstronomik\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003e10 year warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Astronomik","offers":[{"title":"MaxFR 1.25\" (M28.5)","offer_id":44127866847461,"sku":"AK-8h11hy","price":244.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR 2\" (M48)","offer_id":44127866880229,"sku":"AZ-8h11hz","price":543.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter EOS APS-C","offer_id":44127866912997,"sku":"AK-8h11hx","price":339.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter EOS XL","offer_id":44127866945765,"sku":"AK-8h11i1","price":584.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter EOS R XL","offer_id":44127866978533,"sku":"AK-8h11i0","price":611.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter Sony alpha 7","offer_id":44127867011301,"sku":"AK-8h11i3","price":611.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter Nikon XL","offer_id":44127867044069,"sku":"AK-8h11i2","price":611.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR Clip-Filter Nikon Z XL","offer_id":44127867076837,"sku":"AK-8h11lh","price":611.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR 31mm","offer_id":44127867109605,"sku":"AK-8h11hu","price":312.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR 36mm","offer_id":44127867142373,"sku":"AK-8h11hv","price":339.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR 50mm","offer_id":44127867175141,"sku":"AK-8h11hw","price":543.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR M52","offer_id":44127867207909,"sku":"AK-8h11ne","price":543.0,"currency_code":"CAD","in_stock":true},{"title":"MaxFR 27mm unmounted","offer_id":44127867240677,"sku":"AK-8h11n6","price":230.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/astronomik-oiii-12nm-maxfr-ccd-filter-astronomy-plus-1.jpg?v=1690491617"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/narrowband_collection_b2dbb757-9571-4411-9011-43a70d9a035e.webp?v=1675372580","url":"https:\/\/istronomyplus.com\/collections\/narrowband-sho.oembed?page=2","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}