{"title":"Chroma","description":"\u003ch3 data-start=\"90\" data-end=\"122\"\u003e\u003cem\u003e\u003cstrong\u003eChroma Astronomy Filters\u003c\/strong\u003e\u003c\/em\u003e\u003c\/h3\u003e\n\u003cp data-start=\"124\" data-end=\"417\"\u003e\u003cstrong data-start=\"124\" data-end=\"165\"\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eChroma\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e designs premium narrowband and broadband filters for advanced astrophotography. Known for exceptional transmission, precise bandpass control, and consistent quality, Chroma filters deliver accurate color balance and high contrast for deep-sky imaging.\u003c\/p\u003e","products":[{"product_id":"chroma-lrgb-filter-set","title":"Chroma LRGB Filter Set","description":"\u003ch1\u003eChroma LRGB Filter Set\u003c\/h1\u003e\n\u003cp\u003eChroma LRGB Filter Set includes four individual filters: luminance, red, green and blue. They are available in multiple sizes.\u003c\/p\u003e\n\u003cp\u003eHighly 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. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eWe manufacture 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\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\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\u003eLRGB filter set 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":43652186898661,"sku":"CHR-27101-1.25","price":735.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted","offer_id":43652186931429,"sku":"CHR-27101-2","price":2695.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652186964197,"sku":"CHR-27101-31","price":735.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652186996965,"sku":"CHR-27101-36","price":1155.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652187029733,"sku":"CHR-27101-50","price":2415.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652187062501,"sku":"CHR-27101-50S","price":2555.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-lrgb-filter-set-astronomy-plus_587a97d7-1919-4303-b9b4-2781ded53808.png?v=1690483352"},{"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":"chroma-halrgb-filter-set","title":"Chroma HaLRGB Filter Set","description":"\u003ch2\u003eChroma HaLRGB Filter Set\u003c\/h2\u003e\n\u003cp\u003eThe Chroma HaLRGB Filter Set includes five individual filters: 8nm H-alpha, luminance, red, green and blue. They are available in multiple sizes. H-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). 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. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request. 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. We manufacture 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\u003cstrong\u003eAdditional features:\u003c\/strong\u003e\u003c\/p\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\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 8 nm Ha + LRGB Filter Set 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":43651934912741,"sku":"CHR-27102-1.25","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted","offer_id":43651934945509,"sku":"CHR-27102-2","price":3822.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43651934978277,"sku":"CHR-27102-31","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43651935011045,"sku":"CHR-27102-36","price":1617.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651935043813,"sku":"CHR-27102-50","price":3472.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted","offer_id":43651935076581,"sku":"CHR-27102-50S","price":3626.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-halrgb-filter-set-astronomy-plus_802e891b-aa35-4e54-95a9-a21c15f5a962.png?v=1690483363"},{"product_id":"chroma-bessel-ubvri-filter-set","title":"Chroma Bessel UBVRI Filter Set","description":"\u003ch2\u003eChroma Bessel UBVRI Filter Set\u003c\/h2\u003e\n\u003cp\u003eU-Bessel: UV photometric filter in UVBRI series\u003cbr\u003eV-Bessel: Green (Visible) photometric filter in UVBRI series\u003cbr\u003eB-Bessel: Blue photometric filter in UVBRI series\u003cbr\u003eR-Bessel: Red photometric filter in UVBRI series\u003cbr\u003eI-Bessel: NIR photometric filter in UVBRI series\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eHighly 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.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUBVRI filter set for photometric imaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate \u003c\/span\u003e\u003cspan\u003ein CWL and band pass adherence\u003c\/span\u003e\n\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 Bessel UBVRI Filter Set is made for photometric imaging in five different bandpass.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable, anti-reflective coatings onboth exterior surfaces over applicable transmission range\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 4.9 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParfocal +\/-0.2mm\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 Bessel UBVRI Filter Set 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":43651392864485,"sku":"CHR-27103-1.25","price":1645.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43651392897253,"sku":"CHR-27103-2","price":4620.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651392930021,"sku":"CHR-27103-50","price":4270.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43651392962789,"sku":"CHR-27103-50S","price":4795.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-bessel-ubvri-filter-set-astronomy-plus_6183b9d4-7d3d-46cb-bf11-12af67550a36.png?v=1690483372"},{"product_id":"chroma-lrgb-individual-filters","title":"Chroma LRGB Individual Filters","description":"\u003ch2\u003eChroma LRGB Individual Filters\u003c\/h2\u003e\n\u003cp\u003eYou have the option to buy Chroma LRGB filters individually. The Lum, Red, Green \u0026amp; Blue filters are also available in multiple sizes.\u003c\/p\u003e\n\u003cp\u003eHighly 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. We provide custom coating services for more demanding imaging applications requiring larger apertures such as f\/3 or f\/2. We also can provide larger sizes and unique passbands upon request.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eWe manufacture 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\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\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\u003eFilter of the chosen size and color\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 \/ Luminance (27040)","offer_id":43652254138597,"sku":"CHR-27040-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Red (27041)","offer_id":43652254204133,"sku":"CHR-27041-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Green (27042)","offer_id":43652254269669,"sku":"CHR-27042-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ Blue (27043)","offer_id":43652254335205,"sku":"CHR-27043-1.25","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Luminance (27040)","offer_id":43652254367973,"sku":"CHR-27040-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Red (27041)","offer_id":43652254466277,"sku":"CHR-27041-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Green (27042)","offer_id":43652254499045,"sku":"CHR-27042-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ Blue (27043)","offer_id":43652254564581,"sku":"CHR-27043-2","price":700.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Luminance (27040)","offer_id":43652254630117,"sku":"CHR-27040-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Red (27041)","offer_id":43652254662885,"sku":"CHR-27041-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Green (27042)","offer_id":43652254695653,"sku":"CHR-27042-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ Blue (27043)","offer_id":43652254728421,"sku":"CHR-27043-31","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Luminance (27040)","offer_id":43652254761189,"sku":"CHR-27040-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Red (27041)","offer_id":43652254793957,"sku":"CHR-27041-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Green (27042)","offer_id":43652254826725,"sku":"CHR-27042-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ Blue (27043)","offer_id":43652254859493,"sku":"CHR-27043-36","price":315.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Luminance (27040)","offer_id":43652254892261,"sku":"CHR-27040-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Red (27041)","offer_id":43652254925029,"sku":"CHR-27041-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Green (27042)","offer_id":43652254957797,"sku":"CHR-27042-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted \/ Blue (27043)","offer_id":43652254990565,"sku":"CHR-27043-50","price":630.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Luminance (27040)","offer_id":43652255023333,"sku":"CHR-27040-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Red (27041)","offer_id":43652255056101,"sku":"CHR-27041-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Green (27042)","offer_id":43652255088869,"sku":"CHR-27042-50S","price":665.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm square unmounted \/ Blue (27043)","offer_id":43652255121637,"sku":"CHR-27043-50S","price":665.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-lrgb-individual-filters-astronomy-plus-1_5632751b-5e09-4f32-8342-efb57681df82.png?v=1690483380"},{"product_id":"chroma-bessel-ubvri-individual-filters","title":"Chroma Bessel UBVRI Individual Filters","description":"\u003ch2\u003eChroma Bessel UBVRI Individual Filters\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Bessel UBVRI Filters are made for photometric imaging in five different bandpass. They are available for purchase individually.\u003c\/p\u003e\n\u003cp\u003eU-Bessel: UV photometric filter in UBVRI series\u003cbr\u003eB-Bessel: Blue photometric filter in UBVRI series\u003cbr\u003eV-Bessel: Green (Visible) photometric filter in UBVRI series\u003cbr\u003eR-Bessel: Red photometric filter in UBVRI series\u003cbr\u003eI-Bessel: NIR photometric filter in UBVRI series\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eHighly 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.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUBVRI filter set for photometric imaging\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eExtremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate \u003c\/span\u003e\u003cspan\u003ein CWL and band pass adherence\u003c\/span\u003e\n\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 Bessel UBVRI Filter Set is made for photometric imaging in five different bandpass.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eDurable, anti-reflective coatings onboth exterior surfaces over applicable transmission range\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 4.9 +\/-0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParfocal +\/-0.2mm\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 Bessel UBVRI Filter Set 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 \/ U-Bessel (27050)","offer_id":43651453747429,"sku":"CHR-27050-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ B-Bessel (27052)","offer_id":43651453780197,"sku":"CHR-27052-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ V-Bessel (27051)","offer_id":43651453812965,"sku":"CHR-27051-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ R-Besse(27053)","offer_id":43651453845733,"sku":"CHR-27053-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" round mounted \/ I-Bessel(27054)","offer_id":43651453878501,"sku":"CHR-27054-125","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ U-Bessel (27050)","offer_id":43651453911269,"sku":"CHR-27050-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ B-Bessel (27052)","offer_id":43651453944037,"sku":"CHR-27052-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ V-Bessel (27051)","offer_id":43651453976805,"sku":"CHR-27051-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ R-Besse(27053)","offer_id":43651454009573,"sku":"CHR-27053-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"2\" round mounted \/ I-Bessel(27054)","offer_id":43651454042341,"sku":"CHR-27054-2","price":980.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ U-Bessel (27050)","offer_id":43651454075109,"sku":"CHR-27050-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ B-Bessel (27052)","offer_id":43651454107877,"sku":"CHR-27052-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ V-Bessel (27051)","offer_id":43651454140645,"sku":"CHR-27051-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ R-Besse(27053)","offer_id":43651454173413,"sku":"CHR-27053-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted \/ I-Bessel(27054)","offer_id":43651454206181,"sku":"CHR-27054-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ U-Bessel (27050)","offer_id":43651454238949,"sku":"CHR-27050-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ B-Bessel (27052)","offer_id":43651454271717,"sku":"CHR-27052-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ V-Bessel (27051)","offer_id":43651454304485,"sku":"CHR-27051-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ R-Besse(27053)","offer_id":43651454337253,"sku":"CHR-27053-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted \/ I-Bessel(27054)","offer_id":43651454370021,"sku":"CHR-27054-36","price":483.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ U-Bessel (27050)","offer_id":43651454402789,"sku":"CHR-27050-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ B-Bessel (27052)","offer_id":43651454435557,"sku":"CHR-27052-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ V-Bessel (27051)","offer_id":43651454468325,"sku":"CHR-27051-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ R-Besse(27053)","offer_id":43651454501093,"sku":"CHR-27053-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50 round unmounted \/ I-Bessel(27054)","offer_id":43651454533861,"sku":"CHR-27054-50","price":910.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ U-Bessel (27050)","offer_id":43651454566629,"sku":"CHR-27050-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ B-Bessel (27052)","offer_id":43651454599397,"sku":"CHR-27052-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ V-Bessel (27051)","offer_id":43651454632165,"sku":"CHR-27051-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ R-Besse(27053)","offer_id":43651454664933,"sku":"CHR-27053-50S","price":1015.0,"currency_code":"CAD","in_stock":true},{"title":"50mmx50mm square unmounted \/ I-Bessel(27054)","offer_id":43651454697701,"sku":"CHR-27054-50S","price":1015.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-bessel-ubvri-individual-filters-astronomy-plus_ae74472a-6588-4fd0-8935-455a0cea3ced.png?v=1690483381"},{"product_id":"chroma-jovian-methane-filter","title":"Chroma Jovian Methane Filter","description":"\u003ch2\u003eChroma Jovian Methane Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Jovian Methane Filter is a methane absorption band filter. This filter enhances contrast when imaging objects containing significant levels of methane. Methane-rich components, such as in the atmosphere of the Jovian planets, will appear darker.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eHighly 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.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMethane absorption band filter. This filter enhances contrast when imaging objects containing significant levels of methane. Methane-rich components, such as in the atmosphere of the Jovian planets, will appear darker.\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\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 96%@889nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFWHM = 18nm\u003c\/span\u003e\u003cbr\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 Jovian Methane 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\n\u003cp\u003e \u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25″ round mounted","offer_id":43652005920997,"sku":"CHR-27012-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43652005953765,"sku":"CHR-27012-2","price":1162.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652005986533,"sku":"CHR-27012-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652006019301,"sku":"CHR-27012-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652006052069,"sku":"CHR-27012-50","price":1092.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652006084837,"sku":"CHR-27012-50S","price":1106.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-jovian-methane-filter-astronomy-plus_869235b8-05cc-425b-97cf-660de43384ab.png?v=1690483381"},{"product_id":"chroma-loglow-light-pollution-filter","title":"Chroma LoGlow Light Pollution Filter","description":"\u003ch2\u003eChroma LoGlow Light Pollution Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma LoGlow Light Pollution Filter blocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eHighly 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.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.\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\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 94% avg. across visible passbands\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking ≥ OD1.4@ metal-halide and vapor lamp lines\u003c\/span\u003e\u003cbr\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 LoGlow 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":43652072734949,"sku":"CHR-27030-1.25","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43652072767717,"sku":"CHR-27030-2","price":707.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43652072800485,"sku":"CHR-27030-31","price":385.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43652072833253,"sku":"CHR-27030-36","price":497.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43652072866021,"sku":"CHR-27030-50","price":637.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43652072898789,"sku":"CHR-27030-50S","price":770.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-loglow-light-pollution-filter-astronomy-plus_aeb18fe3-18df-456e-bc22-5af94ab9f898.png?v=1690483381"},{"product_id":"chroma-clear-filter","title":"Chroma Clear Filter","description":"\u003ch2\u003eChroma Clear Filter\u003c\/h2\u003e\n\u003cp\u003eThe Chroma Clear Filter has an average transmission greater or equal to 97% across the 380-1000nm range.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eHighly 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.\u003c\/p\u003e\n\u003cp\u003eChroma 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.\u003c\/p\u003e\n\u003cp\u003eAll filters are manufactured in Vermont.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eT: ≥ 97% avg., 94% min. 380-1000nm\u003c\/span\u003e\u003cbr\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 Clear 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":43651806626021,"sku":"CHR-27044-1.25","price":182.0,"currency_code":"CAD","in_stock":true},{"title":"2″ round mounted","offer_id":43651806658789,"sku":"CHR-27044-2","price":525.0,"currency_code":"CAD","in_stock":true},{"title":"31mm round unmounted","offer_id":43651806691557,"sku":"CHR-27044-31","price":182.0,"currency_code":"CAD","in_stock":true},{"title":"36mm round unmounted","offer_id":43651806757093,"sku":"CHR-27044-36","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"50mm round unmounted","offer_id":43651806789861,"sku":"CHR-27044-50","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"50mm x 50mm square unmounted","offer_id":43651806822629,"sku":"CHR-27044-50S","price":490.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma-clear-filter-astronomy-plus_db188345-188e-4f1c-b394-e1d52af03d46.png?v=1690483381"},{"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. Chroma’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\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\"\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 data-mce-fragment=\"1\"\u003eChroma Lifetime Warranty\u003cbr\u003e\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" Threaded Filter","offer_id":43974607700197,"sku":"CHR-27066-125","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Threaded Filter","offer_id":43974607732965,"sku":"CHR-27066-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":43974607765733,"sku":"CHR-27066-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43974607798501,"sku":"CHR-27066-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":43974607831269,"sku":"CHR-27066-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square Unmounted","offer_id":43974607864037,"sku":"CHR-27066-50X50","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-optimized-for-f2-8-f3-6-27066-astronomy-plus.webp?v=1765049535"},{"product_id":"chroma-3nm-sii-filter-optimized-for-f-2-8-f-3-6-27067","title":"Chroma 3nm SII Filter Optimized for f\/2.8-f\/3.6 (27067)","description":"\u003ch2\u003eChroma 3nm SII Filter Optimized for f\/2.8-f\/3.6\u003c\/h2\u003e\n\u003cp\u003eSII filters isolate 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’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\u003cbr\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\"\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 data-mce-fragment=\"1\"\u003eChroma Lifetime Warranty\u003c\/p\u003e","brand":"Chroma","offers":[{"title":"1.25\" Threaded Filter","offer_id":43974657573093,"sku":"CHR-27067-125","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Threaded Filter","offer_id":43974657605861,"sku":"CHR-27067-2","price":1820.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":43974657638629,"sku":"CHR-27067-31","price":805.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43974657671397,"sku":"CHR-27067-36","price":1085.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":43974657704165,"sku":"CHR-27067-50","price":1750.0,"currency_code":"CAD","in_stock":true},{"title":"50x50mm Square Unmounted","offer_id":43974657736933,"sku":"CHR-27067-50x50","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-optimized-for-f2-8-f3-6-27067-astronomy-plus.webp?v=1690489387"},{"product_id":"chroma-3nm-oiii-filter-optimized-for-f-2-8-f-3-6-used-27066-u","title":"Chroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6 OLDER MODEL - USED (27066-U)","description":"\u003ch2\u003eChroma 3nm OIII Filter Optimized for f\/2.8-f\/3.6 - USED (OLDER MODEL)\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. Chroma’s f\/3.0 filters are designed to minimize spectral shift and hold their shape better in an f\/3.0 beam.\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\"\u003e\u003cspan\u003eChroma 3nm OIII Filter f\/3 optimized 2\"\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Chroma","offers":[{"title":"2\" Threaded Filter","offer_id":48129080131813,"sku":"CHR-27066-2-U","price":999.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/chroma.webp?v=1765050460"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/chroma-astronomy-plus.png?v=1677340879","url":"https:\/\/istronomyplus.com\/collections\/chroma.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}