{"title":"MultiBand \u0026 Broadband","description":"\u003cspan data-mce-fragment=\"1\"\u003eNarrowband filters are \u003c\/span\u003e\u003cb data-mce-fragment=\"1\"\u003edesigned to capture specific wavelengths of light\u003c\/b\u003e\u003cspan data-mce-fragment=\"1\"\u003e. There is a large class of celestial objects known as emission nebulae, and their name arises from the fact that they are actually emitting their own light.\u003c\/span\u003e","products":[{"product_id":"tele-vue-bandmate-nebustar-type-ii-filter","title":"Tele Vue Bandmate Nebustar Type II Filter","description":"\u003ch2\u003eTele Vue Bandmate Nebustar Type II Filter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue Bandmate Nebustar Type II Filter is a unique narrowband design specifically for Tele Vue. It’s available in 1.25″ or 2″ mounted format. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through Tele Vue and wishes that customers “enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.”\u003c\/p\u003e\n\u003ch4\u003eBackground\u003c\/h4\u003e\n\u003cp\u003eThe first thing you’ll notice is that these filters are produced for us in Germany by Astronomik. Tele Vue and Astronomik are two relatively small companies that adhere to the same philosophy. Do it better, or don’t do it at all; the products, customer, and night sky deserve it.\u003c\/p\u003e\n\u003cp\u003eDavid Nagler and Gerd Neumann had crossed paths at astronomy shows for years. Both have had their frustrations with the filter business. From passband to thread tolerances, the filter industry seems like the “wild west” of astronomical products. We had been looking to develop a long-term supplier of state-of-the-art, custom filters and approached Astronomik with the idea of reintroducing Tele Vue’s line of premium quality Bandmate filters; guaranteed to perform and fit, with uniformity beyond any competitive brand. Gerd and Eric of Astronomik were excited with the idea of a partnership with Tele Vue. “When we started into Amateur-Astronomy, Tele Vue already was a legendary brand known for its outstanding quality of their telescopes and eyepieces. Today we are proud to team up with them to share our knowledge and experience in filter design and production and bring the best filters possible to all astronomers worldwide.”\u003c\/p\u003e\n\u003cp\u003eThe distinction you’ll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by Tele Vue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_1 panel entry-content\" id=\"tab-local_1\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_1\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSize: 1.25″ mounted or 2″ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eIn the Box\u003c\/span\u003e\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--local_2 panel entry-content\" id=\"tab-local_2\" role=\"tabpanel\" aria-labelledby=\"tab-title-local_2\"\u003e\n\u003cp\u003e\u003cspan\u003eBandmate Nebustar Type II Filter\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty \u003c\/h3\u003e\n\u003cp\u003eTele Vue 10-Years Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Tele-Vue-Bandmate-Filters-Transmission-Graph.pdf?v=1669922695\" target=\"_blank\"\u003eTele Vue Bandmate Filters Transmission Graph\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Tele Vue","offers":[{"title":"1.25\" mounted","offer_id":43732862468325,"sku":"TV-B2N-0125","price":204.0,"currency_code":"CAD","in_stock":true},{"title":"2\" mounted","offer_id":43732862501093,"sku":"TV-B2N-0200","price":450.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/tele-vue-bandmate-nebustar-type-ii-filter-astronomy-plus-1_eec400cf-7905-402d-ab9d-24d2759a3292.png?v=1690484202"},{"product_id":"idas-nb1-nebula-booster-filter-h-alpha-h-beta-oiii","title":"IDAS NB1 Nebula Booster Filter H-alpha, H-beta \u0026 OIII","description":"\u003ch2\u003eIDAS NB1 Nebula Booster Filter H-alpha, H-beta \u0026amp; OIII\u003c\/h2\u003e\nThe IDAS NB1 Nebula Booster Filter is a triple line-pass filter (H-alpha, H-beta \u0026amp; OIII) which can be used with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. Passing the red Hα+NII and the green-blue Hβ+OIII lines, the NB1 filter enhances the contrast of emission line nebulae without the time-consuming use of single-band filters. IDAS NB Filters are designed to enhance the contrast of emission nebula, yet accommodate the filter spectral shift*when used with modern fast optical systems. All interference filters are subject to a bandpass spectral shift which depends on the angle of incidence of the incoming light. IDAS NB filters are designed to accommodate the spectral shift of modern fast optical systems. When placed in front of an optical system, the spectral shift is determined by the focal length of the optics and the size of the imaging sensor. For an APS-C sensor, up to a 50mm focal length can be accommodated. For a full-frame sized sensor, up to an 80mm focal length can be used. For filters placed between the optical system and imaging sensor, the situation is more complex. IDAS NB filters are designed with modern fast optics in mind and can accommodate an angle of incidence of up to 14°.\n\u003ch4\u003e\u003c\/h4\u003e\n\u003ch4\u003eFeatures\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIdeal flat-top and moderate bandpass\u003c\/li\u003e\n\u003cli\u003eExcellent in-band transmission\u003c\/li\u003e\n\u003cli\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/li\u003e\n\u003cli\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/li\u003e\n\u003cli\u003eAvailable in 52mm and 48mm sizes\u003c\/li\u003e\n\u003cli\u003e2.5mm thickness (parfocal with other IDAS LPS filters)\u003c\/li\u003e\n\u003cli\u003eIDAS-proprietary IGAD\/MBT\/UFPquality\u003c\/li\u003e\n\u003cli\u003eMade in Japan\u003c\/li\u003e\n\u003c\/ul\u003e\nMore on other members of the NB filter family...\n\u003ctable cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eEmission Lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB1\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eTriple - Hβ+OIII, Hα\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB2\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eDual - OIII, Hα\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\"\u003eNB3\u003c\/td\u003e\n\u003ctd valign=\"middle\"\u003eDual - OIII, SII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch4\u003eIDAS Filter Technology\u003c\/h4\u003e\nA chain is only as good as its weakest link. This applies as well to an optical system such as a telescope\/filter\/imager system. With this in mind, IDAS filters are manufactured using unique technologies that result in quality that meets or exceeds that of the rest of your optical imaging system:\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIGAD (Ion-Gun Assist Deposition)\u003c\/b\u003e This coating technology was originally developed for the optical communications field where long-term stability (\u0026gt;25 years) over harsh field conditions is required.IDAS is the first manufacturer to apply this technology to astronomical filters. This results in superior filters with robust coatings and long-term spectral stability even under temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes such as H-alpha, LPS filters, and other narrow bandpass filters. IGAD filters virtually eliminate bandpass shifts from the +\/-3 or 4nm typical of standard coating filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMBT (Multi Band-pass Technology)\u003c\/b\u003e This is technology originally developed for biomedical microscopes, but improved by IDAS by combining it the IGAD hard-coating technology described above. The excellent filter responses possible with this technology allows IDAS to create very complicated filters for astronomical use such as the unique LPS filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUFP (Ultra Fine Polish) Finishing\u003c\/b\u003e IDAS filters are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eNB1 Filter\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"48mm mounted (2mm thickness)","offer_id":45659500839141,"sku":"IDA-NB1-48ST2","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"ZWO Cameras","offer_id":43673497665765,"sku":"IDA-NB1-ZF","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"DS for use with IDAS AD42-DSS","offer_id":47818781491429,"sku":"IDA-NB1-DS","price":297.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/products\/IDAS-NB1-Nebula-Booster-Filter-1.webp?v=1668192318"},{"product_id":"idas-heuib-ii-h-alpha-enhanced-uv-ir-cut-filter","title":"IDAS HEUIB-II H-alpha Enhanced UV\/IR Cut Filter","description":"\u003ch2\u003eIDAS HEUIB-II H-alpha Enhanced UV\/IR Cut Filter\u003c\/h2\u003e\n\u003cdiv\u003eThe IDAS HEUIB-II (\u003cstrong\u003eH\u003c\/strong\u003e-α \u003cstrong\u003eE\u003c\/strong\u003enhanced \u003cstrong\u003eU\u003c\/strong\u003eV \u003cstrong\u003eI\u003c\/strong\u003eR \u003cstrong\u003eB\u003c\/strong\u003elocking) filter is designed for enhanced spectrum DSLR's and one-shot color CCD astronomical cameras.\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv\u003eBesides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos. Some comparison shots taken with the enhanced Canon 6DH (standard Canon UV\/IR blocking filter vs. HEUIB-II filter) show a clear difference both in background sky color balance and contrast of H-alpha nebulosity in the extremely faint object IC1396. Note the good background color balance as shown in the histograms of the individual color channels of the HEUIB-II filtered image. \u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\n\u003cimg style=\"float: none;\" height=\"252\" width=\"445\" src=\"https:\/\/www.sciencecenter.net\/hutech\/idas\/heuib-2\/heuib-ii-s.jpg\" alt=\"IDAS HEUIB-II filter bandpass plot\"\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003eThe HEUIB-II filter also returns normal daylight color balance to spectrum-enhanced cameras as can be seen in this photo at right taken with normal DSLR auto-white-balance (AWB).\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch4\u003eIDAS Filter Technology\u003c\/h4\u003e\n\u003cp\u003eA chain is only as good as its weakest link. This applies as well to an optical system such as a telescope\/filter\/imager system. With this in mind, IDAS filters are manufactured using unique technologies that result in quality that meets or exceeds that of the rest of your optical imaging system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIGAD (Ion-Gun Assist Deposition)\u003c\/b\u003e This coating technology was originally developed for the optical communications field where long-term stability (\u0026gt;25 years) over harsh field conditions is required. IDAS is the first manufacturer to apply this technology to astronomical filters. This results in superior filters with robust coatings and long-term spectral stability even under temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes such as H-alpha, LPS filters, and other narrow bandpass filters. IGAD filters virtually eliminate bandpass shifts from the +\/-3 or 4nm typical of standard coating filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMBT (Multi Band-pass Technology)\u003c\/b\u003e This is technology originally developed for biomedical microscopes, but improved by IDAS by combining it the IGAD hard-coating technology described above. The excellent filter responses possible with this technology allows IDAS to create very complicated filters for astronomical use such as the unique LPS filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUFP (Ultra Fine Polish) Finishing\u003c\/b\u003e IDAS filters are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eIdeal precision prime focus T-Adapter for your astro imaging\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSCA Provides 360 deg. rubber square rings contact for the most secure and reliable adaption in your focuser\u003c\/li\u003e\n\u003cli\u003eSCA Brings your Camera to the Closest Optical Axis in the Drawtube\/Visual back for BEST Imaging Result\u003c\/li\u003e\n\u003cli\u003eSCA Eliminates Drawtube\/Visual Back Slop\u003c\/li\u003e\n\u003cli\u003eSCA Eliminates unstable locking from thumbscrew or unified compression ring\u003c\/li\u003e\n\u003cli\u003eSCA Accepts the Imperfection of a Drawtube\/Visual Back\u003c\/li\u003e\n\u003cli\u003eShort SCA Profile Prevents Oscillation\u003c\/li\u003e\n\u003cli\u003eSCA Damps Vibration\u003c\/li\u003e\n\u003cli\u003eSCA Accepts Filter Thread device.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ctable border=\"0\" cellspacing=\"0\"\u003e\n\u003ccolgroup width=\"174\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"199\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"464\"\u003e\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eType\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eModel\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eUse \u0026amp; Thickness\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m48.htm\"\u003eM48\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 48S \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM48mm P0.75mm, substrate thickness 2.5mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m48.htm\"\u003eM48\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 48ST2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM48mm P0.75mm, substrate thickness 2.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003ca href=\"https:\/\/idas.uno\/space\/en\/IDAS\/frames\/m52.htm\"\u003eM52\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II 52ST2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eM52mm P0.75mm, substrate thickness 2.0mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003eDi2\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II Di2 \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003edrops in AD19.4 drop-in mount adapter\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"33\"\u003e\u003cspan style=\"color: #000000;\"\u003eZF\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II DRE \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003efor use with ZWO cams (fb 6.5mm) and also IDAS AD19.4 drop-in filter mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" align=\"center\" height=\"62\"\u003e\u003cspan style=\"color: #000000;\"\u003eDRE\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eHEUIB-II ZF \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003efor Canon EF-EOSR drop-in mount adapter \u0026amp; Meike MK-EFTR-C (EF-R) \u0026amp; MK-EFTE-C (EF-E) drop-in mount adapters - Details at:\u003ca href=\"https:\/\/idas.uno\/space\/en\/support\/DRE-manual-en.pdf\"\u003e IDAS DRE Filter\u003c\/a\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eIdas HEUIB-II Filter at selected size :\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eM48 S\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eM48 ST2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eM52\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDi2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eZF\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDRE\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"IDAS","offers":[{"title":"48mm (2 mm thickness)","offer_id":43673215959269,"sku":"IDA-HEUIBII-48ST2","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"52mm (2 mm thickness)","offer_id":43673216024805,"sku":"IDA-HEUIBII-52ST2","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"Di2 drop in filter","offer_id":43673215992037,"sku":"IDA-HEUIBII-Di2","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"DRT for EF-EOSR","offer_id":43673216057573,"sku":"IDA-HEUIBII-DRT","price":347.0,"currency_code":"CAD","in_stock":true},{"title":"ZF for ZWO Cameras","offer_id":43673216090341,"sku":"IDA-HEUIBII-ZF","price":245.0,"currency_code":"CAD","in_stock":true},{"title":"DZ for use with ZWO cams","offer_id":47817048162533,"sku":"IDA-HEUIBII-DZ","price":297.0,"currency_code":"CAD","in_stock":true},{"title":"DS for use with IDAS AD42-DS","offer_id":47817048621285,"sku":"IDA-HEUIBII-DS","price":297.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/idas-heuib-ii-h-alpha-enhanced-uvir-cut-filter-astronomy-plus.webp?v=1690484525"},{"product_id":"zwo-duo-band-filter","title":"ZWO Duo-Band Filter","description":"\u003ch2\u003eZWO Duo-Band Filter\u003c\/h2\u003e\n\u003cp\u003eThe ZWO Duo-Band Filter is a dual narrowband filter primarily aimed at complementing our range of colour ASI cameras. The Duo-Band filter is aimed at the astronomer who may already own a One Shot Colour (OSC) camera and wants to image using narrowband techniques or emission objects without purchasing a mono camera, filter wheel and narrowband filter set.\u003c\/p\u003e\n\u003cp\u003eThe Duo-Band filter offers an economical entry into the world of narrowband imaging and can also offer a practical solution to imaging in light polluted urban areas.\u003c\/p\u003e\n\u003cp\u003eThe dual band pass nature of the Duo-Band filter passes light at Hα (656nm) and OIII (500nm) wavelength, and can reduce the interference from natural light sources such as moonlight, or artificial light pollution such as street lighting.\u003c\/p\u003e\n\u003cp\u003eIt can help improve the contrast and visibility of deep sky objects such as emission nebula using a OSC camera.\u003c\/p\u003e\n\u003cp\u003eIf you are looking for a solution to deep sky photography in light pollution area, then ZWO Duo-Band Filter will be a great choice.\u003c\/p\u003e\n\u003cp\u003eThe Duo-Band filter can be used with all ASI cameras and EFW Electronic Filter Wheel and comes in 1.25” and 2” sizes.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAerometal material. Precise CNC machining;\u003c\/li\u003e\n\u003cli\u003eFine sandblasting process and anodized finish;\u003c\/li\u003e\n\u003cli\u003eExtinction treatment to prevent reflection;\u003c\/li\u003e\n\u003cli\u003eLaser engraving font that will never fade;\u003c\/li\u003e\n\u003cli\u003ePrecise double-sided optical coating;\u003c\/li\u003e\n\u003cli\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces;\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eKindly Reminder\u003c\/h4\u003e\n\u003cp\u003eThe incoming light transmitted through the filter should be perpendicular to the filter, or the incident angle should be less than 8°. Therefore, this product is not suitable for wide-angle or ultra wide-angle lenses.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15nm (H-alpha)\n\u003cp\u003e35nm (OIII)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25″ Round Mounted\n\u003cp\u003e2″ Round Mounted\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGlass Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface Quality\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60\/40 (Refer to MIL-O-13830)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmission\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMore than 90% transmission at major OIII line 486.nm1, 496nm and 501nm.\n\u003cp\u003eMore than 80% transmission at Ha line 656.3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSchott substrate material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFilter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCase\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/fr\/pages\/zwo-warranty?_pos=1\u0026amp;_psq=zwo+warranty\u0026amp;_ss=e\u0026amp;_v=1.0\" rel=\"noopener\" target=\"_blank\"\u003eZWO 2-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/zwo-guides-and-manuals\" rel=\"noopener\" target=\"_blank\"\u003eZWO General Product \u0026amp; Software Manuals\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ZWO-Duo-Band-Filter-Transmission-Curve.pdf?v=1670536776\" target=\"_blank\"\u003eZWO Duo-Band Filter Transmission Curve\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\" Round Mounted","offer_id":43751398998245,"sku":"ZWO-DB1.25","price":139.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Round Mounted","offer_id":43751399031013,"sku":"ZWO-DB2","price":239.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/zwo-duo-band-filter-astronomy-plus-1_116c90c8-d6e0-4f00-9651-419973ecef35.png?v=1690484790"},{"product_id":"optolong-l-pro-filter","title":"Optolong L-Pro Filter","description":"\u003ch1\u003eOptolong L-Pro Filter\u003c\/h1\u003e\n\u003cp\u003eThe Optolong L-Pro Filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\n\u003cp\u003eOptolong L-Pro is multi-bandpass filter which offers better color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae and globular star clusters. L-Pro is the best choice for light pollution suppression.\u003c\/p\u003e\n\u003ch4\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp\u003eSuitable for visual observation and astrophotography.\u003c\/p\u003e\n\u003cp\u003eL-Pro filter has a very low transmission reduction rate against continuous spectrum space objects, and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae and globular star clusters. The same holds true for visual star observations.\u003c\/p\u003e\n\u003cp\u003eL-Pro filter alone can suppress infrared wavelength, and thus can be used at ease for “L” image shootings with CCDs.\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eSchott substrate material\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness 2.0 mm (1.25”\/2”\/77mm) | 1.0 mm (Clip series)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 seconds parallelism over the both surfaces\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHigh transmission at major nebula emission lines (i.e. H-alpha 656nm, OIII 496nm\u0026amp;500nm, SII 672nm and H-beta 486nm).\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePrecision off-band blocking, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm).\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSONY COMPATIBILITY (pre-2023) :\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptolong Sony-FF clip filter available for below camera body:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA7M\/ A7M2\/ A7M3、A7R\/ A7R2\/ A7R3、A7S\/ A7S2\/ A7S3、A9\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplicable Lenses: Full range of E-mount main and auxiliary lens  \u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003eCoating Technology\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eL-Pro Filter\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\" Mounted","offer_id":43697571135717,"sku":"OL-L-PRO-1.25","price":208.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":43697571168485,"sku":"OL-L-PRO-2","price":278.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Canon EOS APS-C","offer_id":43697571201253,"sku":"OL-L-PRO-EOS-APS-C","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Canon EOS Full Frame","offer_id":43697571234021,"sku":"OL-L-PRO-EOS-FF","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Nikon Z full frame","offer_id":48076843188453,"sku":"OL-L-PRO-NK-Z","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"Clip for Nikon Full Frame","offer_id":43697571266789,"sku":"OL-L-PRO-NK-FF","price":377.0,"currency_code":"CAD","in_stock":true},{"title":"Sony Full Frame (2023 Version) \/ Check compatibility","offer_id":43697571332325,"sku":"OL-L-PRO-SN-FF","price":250.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-R","offer_id":46339805970661,"sku":"","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"77mm Round Mounted","offer_id":43697571299557,"sku":"OL-L-PRO-77","price":405.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-pro-filter-astronomy-plus-1.webp?v=1690485403"},{"product_id":"optolong-l-enhance-filter","title":"Optolong L-eNhance Duo Band Filter","description":"\u003ch1\u003eOptolong L-eNhance Duo Band Filter\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. The filter is available in the following sizes: 1.25″, 2″ \u0026amp; clip filter for Canon EOS. The clip version is compatible with all Canon EF lenses, but doesn’t suit Canon EF-S lenses. The following cameras are compatible: 7D2, 80D, 800D, 77D, 70D, 760D, 750D, 700D, 650D, 600D, 550D, 500D, 400D, 100D, 1100D, 1200D \u0026amp; 1300D.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Optolong L-eNhance Filterprovides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily light-polluted areas. Optolong believes the design of our L-eNhance filter is a technical innovation among filters. It effectively isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%. The performance of this filter delivers images that superbly control the impact from light polluted skies.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O is meaning for exploration of life.\u003cbr data-mce-fragment=\"1\"\u003eTherefore, we highlight H-a, H-b, O3 and O2, and reduce the signal of sulfur.\u003c\/p\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003eMain Use and Performance\u003c\/h4\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuitable for visual observation and astrophotography.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem\u003e\u003cstrong\u003eL-Enhance Performance\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cimg src=\"https:\/\/www.optolong.com\/uploads\/images\/20210703\/48c07ebe8a88353aa27c0031c7e973d0.png\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSbustrate:\u003c\/em\u003e B270\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cem\u003eThickness:\u003c\/em\u003e 1.85mm\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTpeak:\u003c\/em\u003e  T\u0026gt;90%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking range:\u003c\/em\u003e 300-1000nm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eBlocking depth:\u003c\/em\u003e light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eSurface quality:\u003c\/em\u003e 60\/40\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eTransmitted Wavefront RMS:\u003c\/em\u003e λ\/4\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cem\u003eParallelism:\u003c\/em\u003e 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eMajor Emission Lines of Nebulae : \u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-Alpha : 656.3nm\u003c\/li\u003e\n\u003cli\u003eH-Beta : 486.1nm\u003c\/li\u003e\n\u003cli\u003eOIII : 495.nm \u0026amp; 500.7 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eOptolong 3-Years Warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697303257317,"sku":"OL-L-ENHANCE-1.25","price":250.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697303290085,"sku":"OL-L-ENHANCE-2","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C Clip","offer_id":43697303322853,"sku":"OL-L-ENHANCE-EOS","price":362.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-enhance-filter-astronomy-plus-1.webp?v=1690485404"},{"product_id":"optolong-l-extreme-dual-band-narrow-band-filter-l-extreme","title":"Optolong L-Extreme Dual-Band Filter","description":"\u003ch1\u003eOptolong L-Extreme Dual-Band Astronomy NarrowBand Filter\u003c\/h1\u003e\n\u003cp\u003eThe advantage of the L-eXtreme filter is that there is no transmission between the H-beta and OIII lines and there are also no nebula emission lines there. In this case, it isn’t letting light pollution come through so it maximizes nebula signals and the sky background is made darker while imaging.\u003c\/p\u003e\n\u003cp\u003eThe L-eXtreme filter should better isolate the emission lines and better protect from light pollution.\u003c\/p\u003e\n\u003ch4\u003eL-Extreme Introduction\u003c\/h4\u003e\n\u003cp\u003eOptolong L-eXtreme is a two 7 nm bandpass filter which can be used with one-shot color cameras like DSLR’s (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost-effectiveness of this filter allows amateurs to image a rich emission nebula, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be a better choice for fast systems at a competitive price. It isolates the H-alpha, and Oxygen-iii nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who are living in very light-polluted areas, or when the moon is out, the L-eXtreme will be a good filter.\u003c\/p\u003e\n\u003cp\u003eUnlike the L-eNhance filter which is a tri-band (transmits H-b, H-a, and O-iii), the L-eXtreme filter is dual-band that passes H-a and O-iii emission lines.\u003c\/p\u003e\n\u003cp\u003eHydrogen is the largest, the most primitive, the simplest, and the oldest element in the universe. Scientists consider that Hydrogen amounts to more than 90% of visible substance in space. Our sun is 5 billion years old, but so far hydrogen is still the key matter of nuclear fusion. While the sulfur element does not have much scientific significance, so keeping H and O for the exploration of life.\u003c\/p\u003e\n\u003cp\u003eTherefore, Optolong highlights H-a, H-b, O-iii, and O-ii, and reduce the signal of sulfur.\u003c\/p\u003e\n\u003ch4\u003eL-eXtreme Performance:\u003c\/h4\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eI. Compare: L-eXtreme VS no filter © Vincent Cheng\u003c\/strong\u003e\u003c\/u\u003e \u003cimg height=\"489\" width=\"457\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/5bcdb1e79c79231df851f9b60f152ba9.png\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eII. NGC6946, Barnard 150 \u0026amp; Sh2-129 Flying Bat nebula ©José Jiménez\u003c\/strong\u003e\u003c\/u\u003e NGC6946, Barnard 150 \u0026amp; Sh2-129 Flying Bat nebula Canon 6D mod \u0026amp; WO SpaceCat 51 RGB 25 x 600\" ISO 3200 - Optolong L-Pro H-Alpha \u0026amp; OIII 20 x 1500\" ISO 3200 -\u003cu\u003e \u003cstrong\u003eOptolong L-eXtreme\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"252\" width=\"503\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/1840a8e24b716e2297a92bd4aa933ede.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIII. The Rosette and Cone Nebulas ©Starizona\u003c\/strong\u003e\u003c\/u\u003e The image of the Rosette and Cone Nebulas is an example under about the worst conditions: a very wide field of view (135mm lens, 8 x 5.5 degrees), a very fast focal ratio (f\/1.8) and with the 58% illuminated moon only 17 degrees outside the field of view!  It is 20 exposures of 90 seconds each with the ZWO ASI294.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"343\" width=\"500\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/5d3cbec016b1e67e43be0157c53c10a8.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eIV. IC1396 Elephant Trunk nebula ©José Jiménez \u003c\/strong\u003e\u003c\/u\u003e A new job with Optolong L-eXtreme filter and the new Askar Lens FRA 400 tube; IC1396 Elephant Trunk nebula La Jonquera - Girona - Spain May 2020 Equipment used : Canon 6D mod Askar FRA 400mm Sharpstar Optics Fong Michael RGB 6 x 1500\" ISO 6400 \u003cu\u003e\u003cstrong\u003eOptolong L-eXtreme\u003c\/strong\u003e\u003c\/u\u003e Sky Watcher EQ6 Mount Guide camera QHY5 Flats, Darks \u0026amp; Bias Calibrated, stacked and processed with Pixinsight, final tweaks with Lightroom\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"331\" width=\"504\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/fd6ecb8b50249153970ab1b4eb64223e.jpg\" class=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eV. NGC6188 Fighting Dragons of Ara  ©Tommy Lim KW  \u003c\/strong\u003e\u003c\/u\u003e OBJECTS: NGC6188 FIGHTING DRAGONS OF ARA LOCATION: MERSING, JOHOR CAMERA: QHY168C TELESCOPE: 4\" REFRACTOR MOUNT: SKYWATCHER AZ-EQ5GT FILTERS: OPTOLONG L-EXTREME FILTER. EXPOSURE: 30 X 300SEC Stacked in Siril and processed in Pixinsight.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"327\" width=\"508\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20200716\/e2b193114d02ba2a75138093d52f0e1c.jpg\" class=\"\"\u003e \u003cstrong\u003eWarm prompt\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAbout color: due to the influence of ambient light, color difference of the display and flash photography, the color of the product may have some color difference. Detailed color is in accordana with the final product.\u003c\/li\u003e\n\u003cli\u003eAbout coating: the interference filter will show different colors under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/li\u003e\n\u003cli\u003eAbout the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/li\u003e\n\u003cli\u003eAbout the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003eSpectrum and Characteristic:\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003eSbustrate: B270\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness: 1.85mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTpeak:  T\u0026gt;90%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking range: 300-1000nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBlocking depth: light pollution  line blocking \u0026gt;99%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface quality: 60\/40\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eTransmitted Wavefront RMS: λ\/4\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism: 30s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e▲The \u003cspan style=\"color: #bc1f1f;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eRED\u003c\/strong\u003e\u003c\/span\u003e line shows the line of H-alpha.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\" style=\"color: #038b0b;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eGREEN\u003c\/strong\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eline shows the emmission of OIII. The artifical emission lines are shown in \u003cspan data-mce-fragment=\"1\"\u003e\u003cspan style=\"color: #ff8000;\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eORANGE\u003c\/strong\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003cimg height=\"110\" width=\"668\" data-mce-fragment=\"1\" data-ll-status=\"loaded\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" class=\"aligncenter lazyloaded\"\u003e\u003c\/p\u003e\n\u003ch4\u003eCoating Technology\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003ePacking\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: silve box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":43697369940197,"sku":"OL-L-EXTREME-1","price":334.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43697369972965,"sku":"OL-L-EXTREME-2","price":432.0,"currency_code":"CAD","in_stock":true},{"title":"Nikon Z mirroless mount","offer_id":48076800622821,"sku":"OL-L-EXTREME-NK-Z","price":363.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-R","offer_id":48076800655589,"sku":"OL-L-EXTREME-EOS-R","price":363.0,"currency_code":"CAD","in_stock":true},{"title":"Sony-FF","offer_id":48076800688357,"sku":"OL-L-EXTREME-S-FF","price":363.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-extreme-dual-band-filter-astronomy-plus-1.webp?v=1690487119"},{"product_id":"celestron-h-alpha-h-beta-oiii-imaging-filter-rasa-8-93619","title":"Celestron H-alpha H-beta OIII imaging filter, RASA 8 (93619)","description":"\u003ch2\u003eCelestron H-alpha H-beta OIII imaging filter, RASA 8\u003c\/h2\u003e\n\u003cp\u003eBring out the best in your nebulae astroimages with the H-alpha H-beta OIII (Hα-Hβ-OIII) Imaging Filter for the 8” RASA. This specialized filter allows high transmission of light from emission nebulae while blocking light pollution, helping to make your images pop with detail off the black sky background with superior contrast. Fortunately, many sources of light pollution have relatively discreet emission spectra; they emit primarily at specific wavelengths of light. By strategically blocking these “bad” wavelengths, the filter essentially eliminates the effect of light pollution while letting the “good” wavelengths of light associated with the emission nebula pass through to the camera. You’ll notice much higher contrast in your images immediately, even if imaging from your light polluted backyard! And since the transmission at the key wavelengths is so high, the nebula will not be dimmed—only the background will be blacker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNebula Hunting\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Hα-Hβ-OIII Imaging Filter for the 8” RASA is perfect for imaging emission nebulae like the North America Nebula (NGC 7000), Lagoon Nebula (M8), Orion Nebula (M42), and the Carina Nebula (NGC 3372). The imaging filter transmits key Hα-Hβ-OIII wavelengths that produce high contrast for emission nebulae. The transmission spectrum for the Hα-Hβ-OIII Imaging Filter is 85% or greater at key wavelengths (486nm, 496nm\/501nm, 656nm) and less than 0.5% transmission elsewhere. The Hα-Hβ-OIII Imaging Filter for the 8” RASA is a narrowband filter that blocks much of the visible spectrum and only lets specific wavelengths through. Because of this, it will not work well on broadband emission objects, such as galaxies and star clusters. \u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1935\/4371\/files\/93619_H_-H_-OIII_Imaging_Filter_RASA_8_04_480x480.jpg?v=1618006550\"\u003e\u003c\/p\u003e\n\u003cp\u003eOther similar imaging filters on the market have much narrower bandpasses at the critical Hα-Hβ-OIII wavelengths, but these filters will actually block much of the incoming Hα-Hβ-OIII light for an F\/2 optical system. This is because the light is coming into the filter at a steeper angle, which causes a spectral shift. Using filters not designed specifically for use at F\/2 will cause some of the light from the nebula to be blocked, resulting in a dimmer image. The Celestron Hα-Hβ-OIII Imaging Filter for the RASA 8 was custom engineered to work at F\/2, so none of the “good” light from the nebula is inadvertently blocked by the filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBody and Storage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter is machined aluminum black anodized cell with knurled rim for easy grip during installation.  An anti-reflection coating has been added to the filter to help suppress reflections on the glass. The filter fits directly into the internal filter mount in the RASA 8’s front lens cell, where the optical window normally mounts. By removing the clear window and replacing it with the filter, optical performance for the entire system is maintained. No other adapter is needed. Each filter comes with a foam-lined plastic storage case and retaining ring to safely store the filter or the placeholder optical window glass that came with your RASA when not in use. You will also receive a spectral transmission graph unique to your specific unit, verifying its performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnhance imaging of nebulae with your 8” Rowe-Ackermann Schmidt Astrograph (RASA) by blocking light pollution, improving image contrast, and darkening the sky background.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis filter transmits only the key Hα-Hβ-OIII wavelengths from emission nebulae, providing high contrast that makes them “pop.”\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eThis filter selectively blocks wavelengths of light from sources of light polluted skies and natural sky glow.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eUnlike similar filters with narrower bandpasses, this filter was engineered specifically to work with RASA’s fast F\/2 optics.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits into the 8” RASA’s integrated filter mount, maintaining peak optical performance.\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptically flat surfaces free of defects, constructed of Schott glass with anti-reflection coatings.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\" style=\"box-sizing: inherit; border-collapse: collapse; border-spacing: 0px; text-align: left; width: 1200px; color: #333e48; font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody id=\"spec-block-1\" style=\"box-sizing: inherit;\"\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eGlass type:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eSchott B270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eGlass thickness:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e2mm (0.078\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFilter diameter:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e46mm (1.81\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eClear aperture:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003e43mm (1.69\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 1px solid #e4e8ea;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eCoatings:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eDichroic multi-bandpass and multi-layer anti-reflection coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: inherit; border-bottom: 0px;\"\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px; width: 300px; font-weight: bold;\"\u003eFilter cell:\u003c\/td\u003e\n\u003ctd style=\"box-sizing: inherit; padding: 13px; font-size: 14px; height: 43px;\"\u003eAluminum, black anodized, knurled rim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\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\"\u003eCelestron H-alpha H-beta OIII imaging filter, RASA 8\u003cbr data-mce-fragment=\"1\"\u003e\n\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\"\u003e2-Year Warranty\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":43125836841189,"sku":"CEL-93619","price":461.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/celestron-h-alpha-h-beta-oiii-imaging-filter-rasa-8-93619-astronomy-plus-1.webp?v=1690487227"},{"product_id":"askar-color-magic-3nm-deep-sky-narrowband-filter","title":"Askar Color Magic 3nm Duo-Narrowband Filter (CM-3nm)","description":"\u003ch1\u003e\u003cspan\u003eAskar Color Magic 3nm Duo-Narrowband Filter\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eFor all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’ s new-launched 3nm deep-sky narrowband filter set Color Magic is a professional astrophotography tool specifically designed for deep-sky imaging.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eCompared with the previous Askar 5nm deep-sky filters, this filter set has a narrower bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 3nm narrowband filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eAt the same time, the Color Magic 3nm deep-sky narrowband filter has very good halation control, providing more contribution to your astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAskar 3nm Duo-Band Filter\u003c\/strong\u003e\u003cbr\u003e \u003cbr\u003eAskar 3nm duo-band filter has an extremely narrow bandwidth, and an ultra-high transmittance over 88% at its center wavelength (500.7nm and 656.3nm). Askar 3nm duo-band filter can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the Askar 3nm duo-band filter are still very good. It is so practical and efficient that you can get astronomical images of high quality with just one duo-band filter and an ordinary astronomical colour camera.\u003cbr\u003e \u003cbr\u003eThe Askar 3nm duo-band filter is ideal for photographing emission nebulae, planetary nebulae or supernova remnants, and has a very high transmittance at the central wavelength. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.askarlens.com\/Upload\/165951381275.jpg\" width=\"604\" height=\"206\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cimg src=\"https:\/\/www.askarlens.com\/Upload\/Image23-2(1).jpg\" width=\"519\" height=\"523\"\u003e\u003cbr\u003e\u003cstrong\u003e NGC7000\u003c\/strong\u003e\u003cbr\u003eSky-Watcher 150P newtonian\u003cbr\u003eZWO asi533mc pro\u003cbr\u003eASKAR Colour Magic 3nm Duo Narrowband Filter\u003cbr\u003e70x300″\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.askarlens.com\/Upload\/_6888_ABE_ABE-ps-(1).jpg\" width=\"520\" height=\"442\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cstrong\u003eNGC6888\u003c\/strong\u003e\u003cbr\u003eSky-Watcher 150P newtonian\u003cbr\u003eZWO asi533mc pro\u003cbr\u003eASKAR Colour Magic 3nm Duo Narrowband Filter\u003cbr\u003e42x300″\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/www.askarlens.com\/Upload\/Image26da(1).jpg\" width=\"518\" height=\"518\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cstrong\u003eM8\u003c\/strong\u003e\u003cbr\u003eSkyrover 80APO PRO\u003cbr\u003eZWO asi533mc pro\u003cbr\u003eASKAR Colour Magic 3nm Duo Narrowband Filter\u003cbr\u003e36x300″\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e3nm Duo-Band Filter 2”\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFWHM: 3nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCWL: 500.7nm \u0026amp; 656.3nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePeak transmittance：88%\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThickness：1.85 ± 0.05mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBarrier property：≥OD5 @ 200-1100nm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eSurface finish：60\/40\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eParallelism：30″\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"value\"\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":43628298895589,"sku":"ASK-CM-3nm","price":500.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/askar-color-magic-3nm-deep-sky-narrowband-filter-astronomy-plus_d565c223-48cc-4957-a915-c00c022e7935.jpg?v=1690488387"},{"product_id":"antlia-alp-t-dual-band-5nm-highspeed-filter-2-00-mounted","title":"Antlia ALP-T Dual Band Ha+OIII 5nm Highspeed Filter","description":"\u003ch2\u003eAntlia ALP-T Dual Band Ha+OIII 5nm Highspeed Filter\u003c\/h2\u003e\n\u003cp\u003eALP-T Dual Band 5nm Highspeed Filters are further optimized to work with high-speed imaging systems by shifting slightly the passband and center wavelength. Using these highspeed filters between optics f\/2.2 and f\/3.6 shows much stronger and more contrasted in nebulae imaging compared to the standard version.\u003c\/p\u003e\n\u003cp\u003eFor optics f-ratios slower than f\/3.6, the standard ALP-T Dual Band 5nm filter is highly recommended. Meanwhile, if you seek the best possible performance with any optics faster than f\/2.2, the highspeed version is the best choice.\u003c\/p\u003e\n\u003cp\u003eBut keep in mind, the blue shift data by the computer simulation indicates narrowband filter shifts its bandwidth to shorter wavelengths with faster optics than f\/2, transmission at the emission wavelength may decrease perhaps 15%-20%. Although the Antlia ALP-T highspeed filter has similar transmission rates reduction in the H-a and OIII when the filter is used on fast optics, based on current standard version users’ data, it is evident that the filter still has the high performance of increase in emission nebula contrast and minimized halo.\u003c\/p\u003e\n\u003cp\u003eThe highspeed version price is the same as the standard filters and double benefits for the high-speed optics users. Worth mentioning is that Antlia inspected and measured products piece by piece with one of Agilent Cary’s professional spectrophotometer, resolution\/slit width is up to 0.2nm, which make us provide highly reliable and consistent products to you.\u003c\/p\u003e\n\u003cp\u003eThe Antlia ALP-T dual band 5nm series filter is a dual line-pass filter that was designed to be used primarily with one-shot color (OSC) cameras such as DSLR’s and astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time. The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolate the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.\u003c\/p\u003e\n\u003cp\u003eThe filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post-processing efforts to isolate faint details from the background light pollution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned especially for fast astronomy optics, in particular f-ratios f\/2.2 to f\/3.6\u003c\/p\u003e\n\u003cp\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/p\u003e\n\u003cp\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths adds signal-to-noise\u003c\/p\u003e\n\u003cp\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/p\u003e\n\u003cp\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/p\u003e\n\u003cp\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/p\u003e\n\u003cp\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/p\u003e\n\u003cp\u003eNear IR (NIR) is blocked up to 1050nm\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSolar imaging\u003c\/p\u003e\n\u003cp\u003eNight visual observation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot Permitted:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/p\u003e\n\u003cp\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" width=\"585px\" align=\"LEFT\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003eHydrogen-alpha\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003eOxygen III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eFWHM\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e5nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e657.8nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e502.2nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e88%\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e82%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eBlocking\u003c\/td\u003e\n\u003ctd colspan=\"2\" rowspan=\"1\" valign=\"top\" data-mce-fragment=\"1\"\u003e≥OD4.5 @ 300-1050nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"top\" data-mce-fragment=\"1\"\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-mce-fragment=\"1\"\u003e  \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2” (M48*0.75)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpectrum Curve:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"ALP-T Duanl Band 5nm Highspeed Filtes Spectrum Curve.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgjqickgYov6i9hwIwwgk4lgw.jpg\" width=\"650\" height=\"832\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eALP-T Highspeed Filter\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cp\u003eAntlia 3-Years Warranty Against Delamination\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":43780787044581,"sku":"AF-ALP-T-HS-2","price":539.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43780787077349,"sku":"AF-ALP-T-HS-36","price":423.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-alp-t-dual-band-5nm-highspeed-filter-astronomy-plus-1.webp?v=1690488398"},{"product_id":"antlia-alp-t-dual-band-5nm-filter","title":"Antlia ALP-T Dual Band 5nm Ha \u0026 OIII \"Gold\" Filter","description":"\u003ch2 data-mce-fragment=\"1\"\u003eAntlia ALP-T Dual Band 5nm Ha\u0026amp;OIII Filter\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e***** Antlia FAMOUS filter known as Gold Filter! *****\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Antlia ALP-T dual band 5nm filter is a dual line-pass filter which was designed to be used primarily with one-shot color (OSC) cameras such as DSLR’s or astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time. The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolates the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post processing efforts to isolate faint details from the background light pollution.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eApplication and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths adds signal-to-noise\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSolar imaging\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNight visual observation\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Permitted:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAdditional independent tests and reviews are available here, please credit the photographer’s names if you use their images on your website.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003e\u003cimg height=\"381\" width=\"579\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgvJCijQYo_JyH3AQw3As43Qc.jpg\" alt=\"IC434_ALP_T+.jpg\" style=\"float: none;\" data-mce-fragment=\"1\" data-mce-style=\"float: none;\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgvJCijQYo_JyH3AQw3As43Qc.jpg\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTarget: IC434 – Horse Head and Flame Nebulae\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Telescope: Skywatcher 130mm F5 w\/MPCC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Mount: Losmandy G11\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Camera : IMX571 26000KPA\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Filter: Antlia ALP-T Dual Band 5nm Filter 2”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Exposure info: 300s X 24\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Bortle scale 5\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Hyunsu Lee (South Korea)\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003e\u003cimg height=\"352\" width=\"527\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg1JKijQYogYbvvQIw3As46gc.jpg\" alt=\"NGC2244_LIGHT_3+.jpg\" style=\"float: none;\" data-mce-fragment=\"1\" data-mce-style=\"float: none;\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg1JKijQYogYbvvQIw3As46gc.jpg\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTarget: NGC2244 – Rosette Nebula\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Telescope: Skywatcher 130mm F5 w\/MPCC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Mount: Losmandy G11\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Camera: IMX571 26000KPA\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Filter: Antlia ALP-T Dual Band 5nm Filter 2”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Exposure info: 300s X 30\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Bortle scale 5\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Hyunsu Lee (South Korea)\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003e\u003cimg height=\"348\" width=\"522\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg85eijQYopMPmxwYw3As46gc.jpg\" alt=\"NGC 6960_Western Veil nebula+.jpg\" style=\"float: none;\" data-mce-fragment=\"1\" data-mce-style=\"float: none;\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg85eijQYopMPmxwYw3As46gc.jpg\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTarget: Western Veil nebula\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Telescope: Skywatcher 130mm F5 w\/MPCC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Mount: Losmandy G11\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Camera: IMX571 26000KPA\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Filter: Antlia ALP-T Dual Band 5nm Filter 2”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Exposure info: 300s X 7\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Bortle scale 5\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Hyunsu Lee (South Korea)\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003e\u003cimg height=\"327\" width=\"513\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg-5qijQYo-b6ohwIw3As4vQc.jpg\" alt=\"IC63_LIGHT+.jpg\" style=\"float: none;\" data-mce-fragment=\"1\" data-mce-style=\"float: none;\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg-5qijQYo-b6ohwIw3As4vQc.jpg\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTarget: IC63 – The Phantom of Cassiopeia\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Telescope: Skywatcher 130mm F5 w\/MPCC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Mount: Losmandy G11\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Camera : IMX571 26000KPA\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Filter: Antlia ALP-T Dual Band 5nm Filter 2″\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Exposure info: 300s X 32\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Bortle scale 5\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Hyunsu Lee (South Korea)\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\" data-mce-fragment=\"1\" data-mce-style=\"text-align: center;\"\u003e\u003cimg height=\"354\" width=\"529\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgwp6ijQYo1KLR4QEw3As46gc.jpg\" alt=\"betelgeuse+.jpg\" style=\"float: none;\" data-mce-fragment=\"1\" data-mce-style=\"float: none;\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgwp6ijQYo1KLR4QEw3As46gc.jpg\"\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTarget: Betelgeuse(Magnitude：0.5)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Telescope: Skywatcher 130mm F5 w\/MPCC\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Mount: Losmandy G11\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Camera: IMX571 26000KPA\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e– Filter: Antlia ALP-T Dual Band 5nm Filter 2”\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCopyright: Hyunsu Lee (South Korea) \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable align=\"LEFT\" border=\"1\" width=\"585px\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\"\u003eHydrogen-alpha\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\"\u003eOxygen III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003eFWHM\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\"\u003e5nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\"\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\"\u003e656.3nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\"\u003e500.7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\"\u003e90%\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\"\u003e82%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003eBlocking\u003c\/td\u003e\n\u003ctd valign=\"top\" rowspan=\"1\" colspan=\"2\"\u003e≥OD4.5 @ 300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd valign=\"top\" colspan=\"2\"\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e2” (M48*0.75)\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum Curve:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg height=\"368\" width=\"580\" data-ll-status=\"loaded\" alt=\"Antlia ALP-T Dualband 5nm spectrum curve.jpg\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg34KijQYowJrAHzDFCTiGBg.jpg\" class=\"need_fix lazyloaded\" data-mce-src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAg34KijQYowJrAHzDFCTiGBg.jpg\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eALP-T Filter\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAntlia \u003cspan data-mce-fragment=\"1\"\u003e3-Years Against Delamination\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":43780770103525,"sku":"AF-ALP-T-2-HaOIII","price":539.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":43780770136293,"sku":"AF-ALP-T-36-HaOIII","price":423.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-alp-t-dual-band-5nm-haandoiii-gold-filter-astronomy-plus-1.webp?v=1690488412"},{"product_id":"antlia-h-beta-and-oiii-filter-1-25","title":"Antlia H-beta and OIII Filter 1.25″","description":"\u003ch2 data-mce-fragment=\"1\"\u003eAntlia H-beta and OIII Filter – 1.25″\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm, and H-Beta 486.1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWhen it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eMain Application and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm, it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSince human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer’s eyes.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable cellspacing=\"0\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003e\u003c\/td\u003e\n\u003ctd width=\"174\" valign=\"top\"\u003eOxygen III\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003eOxygen III\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003eH-Beta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd width=\"174\" valign=\"top\"\u003e500.7nm\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003e495.9nm\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003e486.1nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd width=\"174\" valign=\"top\"\u003e＞90%\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003e＞90%\u003c\/td\u003e\n\u003ctd width=\"168\" valign=\"top\"\u003e＞90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eBlocking\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003eOD4@ 300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eBasic Substrate\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003eOptical, Single, Non-glued substrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eTransmitted Wavefront\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003eLambda\/4 or better\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"185\" valign=\"top\"\u003eParallelism\u003c\/td\u003e\n\u003ctd width=\"509\" valign=\"top\" colspan=\"3\"\u003eless than 30 arcsec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia 3-Years Warranty Against Delamination\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":43628340019429,"sku":"AF-HB-OIII125","price":140.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-h-beta-and-oiii-filter-1-25-astronomy-plus-1.webp?v=1690488414"},{"product_id":"optolong-l-ultimate-dual-band-3nm-filter-2-l-ultimate","title":"Optolong L-Ultimate Dual-Band 3nm Filter","description":"\u003ch1\u003eOptolong L-Ultimate Filter\u003c\/h1\u003e\n\u003cp\u003eIt’s about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae’s emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. …\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eOpotlong L-Ultimate Introduction\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIt’s about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae’s emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere. Maximizes the transmission of the main emission lines of the nebula in OIII (496nm and 500nm) and H-alpha (656nm). Used with DSLR, color\/MONO CMOS and CCD, however, this filter is not suitable for fast ratio systems.\u003c\/p\u003e\n\u003cp\u003eThe advantage of L-Ultimate is that it only passes through the emission lines OIII(500.7nm) and Ha(656.3nm), in which case all other light pollution emission lines are eliminated so that only the emission and reflection signals of the nebula are captured during imaging. Therefore, the sky background of the image is darker, and the contrast between the nebulae and the signal-to-noise ratio are improved to the greatest extent. In heavy light pollution areas, the product can also selectively filter light pollution and clutter signals through the emission lines of nebulae, and finally avoid the impact of light pollution on astrophotography.\u003c\/p\u003e\n\u003cp\u003eIt is different from the series of dual-narrowband L-eNhance and L-eXtreme in that L-Ultimate is a dual-3nm bandwidth filter that only passes through Ha and OIII emission lines. You will get a darker sky background, more contrast of the image and the suppression on stars. L-Ultimate has also been optimized in terms of halo performance, so that there is no obvious halo when shooting on a bright star object.\u003c\/p\u003e\n\u003ch4\u003eFeatures\u003c\/h4\u003e\n\u003ctable align=\"center\" cellpadding=\"1\" cellspacing=\"2\" border=\"1\" class=\"alignleft\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSbustrate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eoptical glass\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOIII 3nm Ha 3nm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e300-1000nm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u0026gt;OD4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface quality\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmitted Wavefront RMS:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eλ\/4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e30seconds\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eL-Ultimate Filter Performance\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eNebulae Flying Bat and Squid in the constellation of Cepheus.\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eSquid (OU4) is a region characterized by very weak OIII emission with a bipolar shape reminiscent of planetary nebulae. Recent studies suggest that Ou4 is actually internal to SH2-129 (the H-alpha-emitting flying bat nebula, reddish in the image), generated by a triple star system located in the center (HR8119, visible as the bright star in the center of Squid).\u003cbr\u003eThe distance from our solar system is estimated at about 1300 light years.\u003cbr\u003eThe lights were taken over 2 years, with total integration equal to 29 hours (21.5 for OU4 and 7.5 for SH2-129).\u003cbr\u003eThis project gave me the opportunity to test the Omegon veTEC 571C camera and the Optolong L-Ultimate filter with excellent results for both products.\u003c\/p\u003e\n\u003cp\u003eLights: 258x300s (Ou4, L-Extreme) + 30x900s (Sh2-129, L-Ultimate)\u003c\/p\u003e\n\u003cp\u003eTelescope1: Apocromatic TS PhotoLine 102 f\/5,6 Triplet FPL53\u003cbr\u003eTelescope2: Takahashi FS60CB @ f\/4.2\u003cbr\u003eCamera1: ZWO ASI 294mc Pro\u003cbr\u003eCamera2: Omegon veTEC 571C\u003cbr\u003eMount: Skywatcher AZ-EQ6 GT\u003cbr\u003eFilters: Optolong Astronomy Filter L-Extreme + L-Ultimate\u003cbr\u003eProcessing: DeepSkyStacker, Photoshop CC, PixInsight\u003cbr\u003eCredit:Tommaso Massimo Stella (Italy)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloaded\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/8e82dcbd4356c2b25658ae4d38898da9.jpg\" alt=\"\" width=\"529\" height=\"361\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eObjects: Veil Nebula\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eCamera: QHY168C\u003cbr\u003eTelescope: Pentax 100 SDUF II F\/4\u003cbr\u003eMount: Skywatcher AZ-EQ5GT\u003cbr\u003eFilter: Optolong 3nm L-Ultimate Filter\u003cbr\u003eFrames: 13 x 240sec lights\u003cbr\u003eCredit:Tommy Lim KW (Malaysia)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloaded\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/0a012c0ef16bddfb90595bf2502e3c51.jpg\" alt=\"\" width=\"531\" height=\"353\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eSh2-132 The Lion nebula\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eProsegue il test del filtro  Ultimate della Optolong Astronomy Filter\u003cbr\u003e96 light da 300 sec\u003cbr\u003eNo dark no flat\u003cbr\u003eCredit:Andrea Maggi\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloaded\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/31ceb16a19983c46396af72fe7ba3cc1.jpg\" alt=\"\" width=\"500\" height=\"335\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eSupernova remnant W63\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e\n\u003cp\u003eSupernova remnant W63 glows like a faint cosmic smoke ring along the plane of the Milky Way toward the northern constellation Cygnus. Its spectral appearance is reflected in the region’s rich complex of interstellar clouds and dust by an eerie blue glow, captured with Optolong’s new dual band 3nn filter!! L-Ultimate…\u003c\/p\u003e\n\u003cp\u003eCanon Eos MK IV mod by CentralDS 20×900″ ISO3200\u003cbr\u003eOptolong L-Ultimate\u003cbr\u003eSkywatcher AZ-GTI mount\u003cbr\u003eGuide camera ZWO ASI 120MM\u003cbr\u003eCredit:José Jiménez (Spain)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloaded\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/4672efc207e69c658cf26c68e7bea6a4.jpg\" alt=\"\" width=\"504\" height=\"338\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eSharpless 129\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eCanon Eos MK IV mod by CentralDS 30×900″ ISO3200\u003cbr\u003eOptolong L-Ultimate\u003cbr\u003eCredit:José Jiménez (Spain)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloaded\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/f94ddb185f8fe14b6659bda59bfa14f0.jpg\" alt=\"\" width=\"515\" height=\"338\" data-ll-status=\"loaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eNGC6888 HOO Version\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eTelescope ASKAR 500\u003cbr\u003eCamera Zwo ASI 6200\u003cbr\u003eFilter Optolong 3nm\u003cbr\u003eSoftware Voyager\u003cbr\u003eCredit:Andrea Maggi (Italy)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloading\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/1d8c80c3e194a0161f9b4569df88ff1f.jpg\" alt=\"\" width=\"486\" height=\"324\" data-lazy-src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/1d8c80c3e194a0161f9b4569df88ff1f.jpg\" data-ll-status=\"loading\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eNGC7635 \u0026amp; Sh2-157\u003c\/strong\u003e\u003c\/u\u003e\u003cbr\u003eDue ore stanotte da Saint Barthelemy\u003cbr\u003eTelescopio Askar 80 PH\u003cbr\u003eCamera Asi 2600\u003cbr\u003eFiltro Optolong Ultimate\u003cbr\u003eCredit:Andrea Maggi (Italy)\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"lazyloading\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/a637b149e53e64b7d6e98dbf75f1c346.jpg\" alt=\"\" width=\"504\" height=\"337\" data-lazy-src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/a637b149e53e64b7d6e98dbf75f1c346.jpg\" data-ll-status=\"loading\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003eReference Spectrum\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg data-ll-status=\"loaded\" height=\"279\" width=\"569\" alt=\"\" src=\"https:\/\/optolong.com\/uploads\/images\/20220813\/affa162a0200e85a43f613d6409654fc.png\" class=\"lazyloaded\"\u003e\u003c\/p\u003e\n\u003cp\u003e※This curve is only for reference, and is not used as the final product data.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003cimg data-ll-status=\"loaded\" height=\"80\" width=\"486\" alt=\"\" src=\"http:\/\/www.optolong.com\/uploads\/images\/20191111\/0ff2d7f395c427aa390ff53daf333cec.jpg\" class=\"aligncenter lazyloaded\"\u003e\u003c\/p\u003e\n\u003ctable class=\"alignleft\" border=\"1\" cellspacing=\"2\" cellpadding=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSbustrate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eoptical glass\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOIII 3nm Ha 3nm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e300-1000nm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlocking\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u0026gt;OD4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface quality\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmitted Wavefront RMS:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eλ\/4\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e30seconds\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e·Multi-layers anti-reflection coating\u003c\/p\u003e\n\u003cp\u003e·Non-cementing optical substrate coating\u003c\/p\u003e\n\u003cp\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eFilter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eOptolong 3-Years Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":44430953251045,"sku":"OL-L-ULTIMATE-125","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44430953283813,"sku":"OL-L-ULTIMATE-2","price":543.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-ultimate-dual-band-3nm-filter-2-l-ultimate-astronomy-plus-1.webp?v=1690488488"},{"product_id":"askar-color-magic-6nm-deep-sky-narrowband-filter","title":"Askar Colour Magic D1 \u0026 D2 6nm Deep-Sky Narrowband Filters","description":"\u003ch1 data-mce-fragment=\"1\"\u003e\u003cspan\u003eAskar Colour Magic D 6nm Deep-Sky Narrowband Filters\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFor all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’ s new-launched 6nm deep-sky Duo-narrowband Filter set colour Magic is a professional astrophotography tool specifically designed for deep-sky imaging.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis 6nm filter set has a narrow bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 6nm Duo-narrowband Filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAt the same time, the Colour Magic 6nm deep-sky Duo-narrowband Filter has very good halation control, providing more contribution to your astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003eAfter the 2\" 6nm duo-narrowband filter (Hα+OIII), Askar ColourMagic Specially launches the SII+OIII 2\" 6nm duo-narrowband filter, which is further convenient for astronomy enthusiasts while maintaining quality. When shooting with the 2\" 6nm duo-narrowband filter (Hα+OIII) and a color camera, users will have remarkable results.\u003cbr\u003e\u003cbr\u003eUsually in astrophotography, the Hα signal-to-noise ratio is stronger while the OIII is relatively weak. As our two duo-narrowband filters are Hα+OIII and SII+OIII, the combination can balance the signal-to-noise ratio of each channel when shooting, and after software processing, it can achieve the ideal result almost as well as shooting with a combination of three narrowband filters and mono camera.\u003cbr\u003e\u003cbr\u003eWe name the  Hα+OIII 2\" 6nm duo-narrowband filter “D1” and the SII+OIII filter “D2”, the combination of them is Askar's latest \"D\" filter set. It offers a new way for color camera users to get similar results without using a mono camera and the SHO filters.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003cbr\u003eThe Askar D filter set offers a new option for astronomy enthusiasts and is sure to please.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cstrong data-mce-fragment=\"1\"\u003eD2 Colour Magic 6nm Duo-narrowband Filter (OIII + SII)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eWhile most of the commercially available duo-narrowband filters for deep-sky astrophotography are in the Ha and OIII bands, ASKAR offers another structure: SII \u0026amp; OIII.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWhen shooting deep-sky galaxies with colour cameras, a duo-narrowband filter in the Ha and OIII bands is often used; whereas with a mono camera, a narrowband filter in the Ha, SII and OIII bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by using SII and OIII duo-narrowband filters mentioned above.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) has an ultra-high transmittance over 90% at its center wavelength (500.7nm and 671nm). Askar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the Askar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) are still very good. It is so practical and efficient that you can get astronomical images of high quality with just one duo-narrowband filter and an ordinary astronomical colour camera.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; SII) is ideal for photographing emission nebulae, planetary nebulae or supernova remnants, and has a very high transmittance at the central wavelength. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cstrong data-mce-fragment=\"1\"\u003eD1 Colour Magic 6nm Duo-narrowband Filter (OIII + Ha)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp style=\"font-weight: 400;\" data-mce-style=\"font-weight: 400;\"\u003e\u003cspan\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha) has an ultra-high transmittance over 90% at its center wavelength (500.7nm and 656.3nm). Askar 6nm Duo-narrowband Filter can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the Askar 6nm Duo-narrowband Filter are still very good. You can get astronomical images of high quality with just one duo-narrowband filter and an ordinary astronomical colour camera.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha) is ideal for photographing emission nebulae, planetary nebulae or supernova remnants, and has a very high transmittance at the central wavelength. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003eAskar 6nm Duo-Band Filter (OIII + SII)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e6nm Duo-narrowband Filter (OIII \u0026amp; SII) 2”\u003cbr\u003eFWHM: 6nm\u003cbr\u003eCWL: 500.7nm \u0026amp; 671nm\u003cbr\u003ePeak transmittance：90%\u003cbr\u003eThickness：1.85 ± 0.05mm\u003cbr\u003eBarrier property：≥OD5 @ 200-1100nm\u003cbr\u003eSurface finish：60\/40\u003cbr\u003eParallelism：30\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong\u003eAskar 6nm Duo-Band Filter (OIII + HA)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e6nm Duo-narrowband Filter (OIII \u0026amp; Ha) 2”\u003cbr\u003eFWHM: 6nm\u003cbr\u003eCWL: 500.7nm \u0026amp; 656.3nm\u003cbr\u003ePeak transmittance：90%\u003cbr\u003eThickness：1.85 ± 0.05mm\u003cbr\u003eBarrier property：≥OD5 @ 200-1100nm\u003cbr\u003eSurface finish：60\/40\u003cbr\u003eParallelism：30”\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\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"value\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAskar Warranty\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Color Magic 6nm 2\" Filters Duo Pack (D1 + D2)","offer_id":43786339221733,"sku":"ASK-CM-D1+D2","price":875.0,"currency_code":"CAD","in_stock":true},{"title":"Color Magic 6nm 2\" Filter D1 (OIII + Ha)","offer_id":43786339254501,"sku":"ASK-CM-D1","price":447.0,"currency_code":"CAD","in_stock":true},{"title":"Color Magic 6nm 2\" Filter D2 (OIII + SII)","offer_id":43786339287269,"sku":"ASK-CM-D2","price":447.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/askar-color-magic-6nm-deep-sky-narrowband-filters-astronomy-plus-1_e3f61ca7-b6dd-42a2-ac60-6c3471eacc96.jpg?v=1690488639"},{"product_id":"vespera-duo-band-filter-ac022","title":"Vaonis Vespera Duo-Band Filter (AC022)","description":"\u003ch1\u003eVaonis Vespera Duo Band Filter\u003c\/h1\u003e\n\u003cdiv class=\"woocommerce-tabs wc-tabs-wrapper\"\u003e\n\u003cdiv aria-labelledby=\"tab-title-description\" role=\"tabpanel\" id=\"tab-description\" class=\"woocommerce-Tabs-panel woocommerce-Tabs-panel--description panel entry-content wc-tab\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKeep only the essential\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Dual Band filter has been designed to allow only two particular wavelengths to pass through to the Vespera sensor:\u003cbr\u003e- O-III\u003cbr\u003e- H-alpha\u003c\/p\u003e\n\u003cp\u003eDue to the filtered wavelengths, it is particularly effective for photographing nebulae in emission (e.g.: Orion nebula M42, Heart nebula IC 1805 …), dark nebulae endowed with hydrogen (e.g.: Horsehead or Elephant's Trunk nebula...), planetary nebulae (e.g.: Owl nebula M97, Dumbbell nebula M27...), supernova remnants (e.g.: Veil nebula, Crab Nebula M1...).\u003c\/p\u003e\n\u003cp\u003eFor globular clusters (e.g.: Hercules cluster M13, cluster M92...), the selectivity of the Dual Band filter will help you to obtain sharper stars.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA filter specifically studied for Vespera\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical quality of the Dual Band filter has been specifically studied by our engineers to offer use at full aperture, without any impact on the optical diameter of the instrument. The lens ring is equipped with an electronic micro-card that allows Vespera to detect the Dual Band filter and adapt its observation and image processing parameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter features 12nm of bandwidth in each wavelength (O-III = 500.7nm, H-alpha = 656.3nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable class=\"woocommerce-product-attributes shop_attributes\"\u003e\n\u003ctbody\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--weight\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e0.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_colors\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003eColors\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\n\u003cp\u003eBlack (exterior)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_net-weight\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003eNet weight\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\n\u003cp\u003e17 g (0.6 oz)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_net-dimensions\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003eNet Dimensions\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\n\u003cp\u003eThickness: 0,6 cm (0.24 in), Width: 7,80 cm (3.07 in)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_materials\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003eMaterials\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\n\u003cp\u003eGlass, Plastic\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"woocommerce-product-attributes-item woocommerce-product-attributes-item--attribute_pa_package-weight\"\u003e\n\u003cth class=\"woocommerce-product-attributes-item__label\"\u003ePackage Weight\u003c\/th\u003e\n\u003ctd class=\"woocommerce-product-attributes-item__value\"\u003e\n\u003cp\u003e60 g (2.12 oz)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIn the Box\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVespera Duo-Band Filter\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/vaonis-warranty\" target=\"_blank\"\u003eVaonis 3-Year Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":43830957506789,"sku":"VO-AC022","price":559.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/vespera-duo-band-filter-ac022-astronomy-plus-1_05820b0d-2f9d-410f-b84c-124e4bdc9c36.jpg?v=1690488694"},{"product_id":"svbony-1-25-2-eos-c-cls-light-pollution-broadband-filters","title":"SVBONY 1.25''\/2'' EOS-C CLS Light Pollution Broadband Filters","description":"\u003ch2\u003eSVBONY 1.25''\/2''\/EOS-C CLS Light Pollution Broadband Filters\u003c\/h2\u003e\n\u003cp\u003eElectron beam gun evaporation with Ion assisted deposition coating technology for durability and resistance to scratching;as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off band.\u003cbr\u003e90% transmission of main nebula emission lines;such as Ha 656nm;OIII\u003c\/p\u003e\n\u003cp\u003e496nm;500nm;SII672nm and H-beta 486nm.\u003cbr\u003e0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 589nm;Hg 435nm and 578nm.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eSuitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eThe SVBONY City Light Suppression broadband filter is designed to improve the visibility of various Deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003cbr\u003e\u003cbr\u003e2. Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the Svbony CLS filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area\u003cbr\u003e\u003cbr\u003e3. Light pollution filter do not eliminate the effects of light pollution or increase the object's brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_60e442fd-5c66-4334-875d-157f06614813.jpg?v=1759433200\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_2053e485-f631-4ab0-83d0-0521444c8031.jpg?v=1759433211\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"box-sizing: border-box; border-collapse: collapse; margin: 0px auto 15px; width: 1240px; border-spacing: 0px; color: #424242; font-family: Poppins, Helvetica, Tahoma, Arial, serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\n\u003ctbody style=\"box-sizing: border-box;\"\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eModel \u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155A\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155B\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eF9155D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.25‘’\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e2‘’\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eEOS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eStandard M28.5*0.6\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eStandard M48*0.75\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eCanon EOS-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003ethickness\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"box-sizing: border-box;\"\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"box-sizing: border-box; padding: 7px 12px; text-align: center; font-size: 12px; border: 1px solid #e8e9eb;\" colspan=\"3\"\u003eCity Light Suppression Filter (CLS Filter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSVBONY 1.25''\/2'' EOS-C CLS Light Pollution Broadband Filters\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25\"","offer_id":43971230499045,"sku":"SVB-F9155A","price":31.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43971230531813,"sku":"SVB-F9155B","price":53.0,"currency_code":"CAD","in_stock":true},{"title":"EOS-C","offer_id":43971230564581,"sku":"SVB-F9155D","price":73.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/svbony-1-25-2-eos-c-cls-light-pollution-broadband-filters-astronomy-plus.webp?v=1690489343"},{"product_id":"antlia-alp-t-dual-band-5nm-sii-hb-filter-1","title":"Antlia ALP-T 2\" Dual Band 5nm SII \u0026 Hb Filter","description":"\u003ch1 data-mce-fragment=\"1\"\u003eAntlia ALP-T Dual Band 5nm SII\u0026amp;Hb Filter\u003c\/h1\u003e\n\u003cp\u003eThe ALP-T dual band 5nm SII\u0026amp;Hb filter is a dual line-pass filter, which lets the deep red Sulfur-II line and the blue Hydrogen-Beta line through and is used with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. It is a significant addition to the\u003cbr data-mce-fragment=\"1\"\u003epopular Antlia ALP-T dual band 5nm Ha\u0026amp;OIII filter and enables false-color images and narrow-band nebula images using OSC. When capturing data with this filter, the nebulae are recorded with greater contrast against the background than without it. The combination of these two dual band filters allows extreme narrow-band images with OSC cameras by capturing the spectral data from 4 channels i.e. Ha\/OIII\/SII\/Hb. The spectrum of these four channels can be separated and recombined into various colour palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or creation of images in various popular false-color palettes such as H-O-Hb, S-H-O, H-S-OHb, H-O-O etc.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhy design SII\u0026amp;Hb bands pass instead of OIII\u0026amp;SII bands?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eThe filter is dedicated to capture H-beta and SII emission lines. We know that SII is singly ionized sulfur that emits light in the deep red part of the spectrum, beyond H-alpha, but the contribution of H-beta to emission lines in nebulae is frequently overlooked, even though it is the second most common Hydrogen emission after the H-alpha line. Capturing more OIII will boost the existing signal but does not give more information. However Hb has the potential to reveal structures not seen using OIII. The design is to capture the H-beta emission line in the certain nebulas that contain some blue spectrum, this cannot be captured by H-alpha, SII and OIII filters. Greater and richer details will be captured in many nebulae images to achieve results with a superior signal-to-noise ratio.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIt is generally accepted that the OIII signal is a relatively weaker contributor to nebulae images. The OIII bandpass sensitivity is an important consideration for any nebulae filter. Most colour cameras (OSC) use a RGGB Bayer pattern. The allocation of twice as many green pixels as\u003cbr data-mce-fragment=\"1\"\u003ecompared to either red or blue pixels, enables a much-improved capture of the OIII signal. Furthermore, higher OIII signal can be achieved by additional exposure using the Antlia ALP-T Ha\u0026amp;O3 filter, then isolating the GB channels, followed by synthesis of an OIII channel to add into your stack.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e In the situation where you may only want to add SII to your Ha\u0026amp;OIII data, then it may be preferable to buy one SII narrowband filter and achieve a cleaner SII spectral emission. However, our new filter design (SII\u0026amp;Hb) includes the H-beta emission line which provides a distinct improvement in nebulae contrast and improved feature separation in Hb areas.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAntlia ALP-T Dual Band 5nm Ha\u0026amp;OIII filter:\u003c\/strong\u003e Dual band filter with a very narrow passband of 5nm in OIII and H-alpha to achieve a higher signal-to-noise ratio. The resulting contrast improvement for OSC is impressive.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAntlia ALP-T Dual Band 5nm SII\u0026amp;Hb filter:\u003c\/strong\u003e Dual band filter with a very narrow pass band of 5nm H-beta and S-II. This filter is ideal for increasing contrast of nebulae that emit in the sulfur and H-beta range using OSC. It provides additional feature separation and isolation in Hb areas.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe advanced multi-coatings on Antlia ALP-T dual band filters effectively isolates the red, Ha line, blue-green, OIII line, deep red SII and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both the ALP-T dual band 5nm Ha\u0026amp;OIII and SII\u0026amp;Hb filter creates a superior signal-to-noise ratio and better contrast in your OSC images.\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eThe main features and application\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003ePasses SII 672.4nm line and H-Beta 486.1nm line;\u003cbr data-mce-fragment=\"1\"\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras;\u003cbr data-mce-fragment=\"1\"\u003eUltra FWHM 5nm allows for increasing in exposure time;\u003cbr data-mce-fragment=\"1\"\u003eRecommended to be used with ALP-T Dual Band 5nm Ha\u0026amp;OIII filter to create images with better signal to noise and better isolation between the 4 channels;\u003cbr data-mce-fragment=\"1\"\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths improves signal-to-noise;\u003cbr data-mce-fragment=\"1\"\u003eExtremely steep bandpass and blackened edges of unmounted sizes to minimize internal reflections;\u003cbr data-mce-fragment=\"1\"\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts;\u003cbr data-mce-fragment=\"1\"\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter;\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSolar imaging\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eNight visual observation\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNot Permitted:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications \u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003ctable align=\"LEFT\" border=\"1\" width=\"585px\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003eSulfur-II\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003eHydrogen-Beta\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eFWHM\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e5nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e672.4nm\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e486.1nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" data-mce-fragment=\"1\"\u003e90%\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" data-mce-fragment=\"1\"\u003e85%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eBlocking\u003c\/td\u003e\n\u003ctd valign=\"top\" rowspan=\"1\" colspan=\"2\" data-mce-fragment=\"1\"\u003e≥OD4.5 \u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" data-mce-fragment=\"1\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd valign=\"top\" colspan=\"2\" data-mce-fragment=\"1\"\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e2” (M48*0.75)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia ALP-T Dual Band 5nm SII\u0026amp;Hb Filter\u003c\/p\u003e\n\u003cdiv class=\"value\" data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia \u003cspan data-mce-fragment=\"1\"\u003e3-Years Against Delamination\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":44097503002853,"sku":"AF-ALP-T-2-SIIHB","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-alp-t-2-dual-band-5nm-siiandhb-filter-astronomy-plus-1.webp?v=1690490638"},{"product_id":"antlia-quad-band-anti-light-pollution-filter-2-mounted","title":"Antlia Quad Band Anti-Light Pollution Filter 2\" Mounted (QUAD-2)","description":"\u003ch1\u003eAntlia Quad Band Anti-Light Pollution Filter 2\" Mounted\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky objects like galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1 as its spectral transmission passes through visible light region, near-ultraviolet (NUV) and near-infrared (NIR) region. Antlia Quad Band filter has a broad bandpass designed to cope with faster optics up to the f\/2 focal ratio.\u003c\/p\u003e\n\u003cp\u003eConsidering the high quantum efficiency (QE) characteristics of the latest cameras in the near-infrared region and this region is less susceptible to artificial light pollution, the Antlia Quad Band Light-Pollution Filter add shigh transmission in the near-infrared (NIR) band. This spectrum design improves image signal-to-noise ratio and contrast by capturing signals in visible bands and NIR region, while also maintaining good color balance and being easier to manage in post-processing. \u003c\/p\u003e\n\u003cp\u003eCertain full-spectrum objects like M51, M83 possess significant signal in the near-infrared (NIR) region, you can possibly capture these deep sky objects more contrasted with the Antlia Quad Band filter under light polluted condition. When using this filter with a camera that has UV\/IR cut protective glass, the visible band transmission signal is retained, but the IR cut limits your ability to capture targets with infrared signal. Therefore, the Antlia Quad Band filter is more suitable for cameras with AR protective glass as they cancapture both NIR and visible band signals.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe main features and application:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAnti-Light Pollution\u003cbr\u003eThe Antlia Quad Band filter is an effective solution for reducing light pollution, as it cuts out most of theorange-yellow lights from 589nm and part of blue lights from LEDs\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePossible to shoot over 95% of deep sky objects\u003c\/li\u003e\n\u003cli\u003eUnique spectral design offers more possibilities for astrophotography\u003c\/li\u003e\n\u003cli\u003eHigh transmittance of the main emission lines Ha\/SII\/OIII\/H-Beta in the visible region, enhances the astrophotography's high SNR and contrast;\u003c\/li\u003e\n\u003cli\u003eNear-infrared (NIR) region transmittance\u003c\/li\u003e\n\u003cli\u003ePassing near infrared region is for shooting deep sky objects that cannot be shot with other filters without NIR transmission\u003c\/li\u003e\n\u003cli\u003eThe broad bandpass designed to cope with faster optics up to the f\/2 focal ratio. - Good color balance\u003c\/li\u003e\n\u003cli\u003eIt is easier to achieve color balance by adding the short-wavelength transmission\u003c\/li\u003e\n\u003cli\u003eSuperior optical reliability reduces post image processing\u003c\/li\u003e\n\u003cli\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/li\u003e\n\u003cli\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront: Lambda\/4 or better. - Parallelism: less than 30 arcsec\u003c\/li\u003e\n\u003cli\u003eWarranty: 3-years against delamination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFilter Ring:\u003c\/h2\u003e\n\u003cp\u003eAntlia standard ring:1.25’’ (M28.5*0.6)，2’’(M48*0.75)\u003cbr\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003cbr\u003eBlack Anodized Finish\u003cbr\u003eLaser Engraving No Fading\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eNot Recommended:\u003c\/h2\u003e\n\u003cp\u003eSolar imaging\u003cbr\u003eNight visual observation\u003c\/p\u003e\n\u003ch2\u003eNot Permitted:\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER\u003c\/strong\u003e\u003cbr\u003eSerious eye damage will result if you fail to observe the warning\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" 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style=\"border-collapse: collapse; font-family: Calibri; font-size: 11pt; color: rgb(0, 0, 0); background-color: transparent; width: 100%;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: nowrap; text-align: left; vertical-align: bottom; border-bottom: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; font-weight: bold; vertical-align: baseline;\"\u003eSpectrum Specifications:\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 30pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: left; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"vertical-align: baseline;\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 12pt; font-weight: bold; vertical-align: baseline;\"\u003eH-alpha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eS-II\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eO-III\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eH-beta\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eNII\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eWavelength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e656.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e671.6nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e495.9nm,\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"1\" rowspan=\"2\" style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e486.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e658.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e673.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e500.7nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e654.8nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003ePeak Transmission\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eBlocking\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"5\" rowspan=\"1\" style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e≥OD4@ 300-1050nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eFilter Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"5\" rowspan=\"1\" style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 14.25pt;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: nowrap; text-align: left; vertical-align: bottom; border-top: 1px solid rgb(167, 167, 167);\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2025_Quad_Band_filter_spectrum_curve.jpg?v=1737230060\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eAntlia Quad Band Anti-Light Pollution Filter 2\" Mounted\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAntlia 3-Years Warranty against Delamination\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":44272880877797,"sku":"AF-QUAD-2","price":281.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/antlia-quad-band-anti-light-pollution-filter-2-mounted-quad-2-astronomy-plus.webp?v=1715808614"},{"product_id":"optolong-l-quad-enhance-filter-2-l-qef","title":"Optolong L-Quad Enhance Filter 2\" Light Pollution Suppression Filter (L-QEF)","description":"\u003ch2\u003eOptolong L-Quad Enhance Filter\u003c\/h2\u003e\n\u003cp\u003eL-Quad Enhance Filter (L-QEF) is a quad bandpass light pollution suppression filter for colour cameras. It effectively suppresses the transmission of light pollution wavelengths, especially light pollution generated by artificial lighting (including mercury and sodium lamps), as well as the effects of natural skylight-induced effects on the shot, thus effectively enhancing the contrast and details of the celestial bodies, and making the objects more distinct and stereoscopic. This filter provides better color balance while improving resistance of light pollution. L-QEF can be used for both wide field astrophotography, such as the Milky Way in Summer and Winter, and deep sky objects such as nebulae, galaxies, star clusters, and so forth; It allows you to save a lot of time during the shooting process and get better results at the same time. The design of quad bandpass maximises the colour balance of nebulae, galaxies and other broadband spectral targets.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCuts out light pollution from mercury and sodium lamps and produces a nice broadband image with minimal colour cast;\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio (SNR);\u003c\/li\u003e\n\u003cli\u003eNear IR cut-off to 1000nm, reducing the effects of IR noise;\u003c\/li\u003e\n\u003cli\u003eL-QEF has more than 90% transmittance of the nebula emission lines at H-Beta\/OIII\/H-Alpha\/SII, with cut-off depth from OD2 to OD4, thus providing a significant increase in resistance to light pollution. L-QEF is good for night sky from Bortel 1 to Bortel 7 levels; (Bortel 8, Bortel 9 environments shall not be recommended, kindly chose Optolong other narrow-band filters, 3nm, 7nm type of filters are available.);\u003c\/li\u003e\n\u003cli\u003eSuitable for wide range of deep sky targets: it covers most nebulae, galaxies, star clusters, reflected and emitted line signals astronomical objects with higher contrast and rich details while maintaining excellent colour balance. L-QEF is superior to other filters of the same type.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 800px;\" cellspacing=\"1\" cellpadding=\"1\" border=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSbustrate\u003c\/td\u003e\n\u003ctd\u003eoptical glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eQuad bandpass filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking range\u003c\/td\u003e\n\u003ctd\u003e300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eOD2-OD4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront RMS\u003c\/td\u003e\n\u003ctd\u003eλ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e Parallelism\u003c\/td\u003e\n\u003ctd\u003e30s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e·Multi-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003e·Non-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003eOptolong L-Quad Enhance Filter 2\"\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":44431039660261,"sku":"OL-L-QEF-2","price":269.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-quad-enhance-filter-2-light-pollution-suppression-filter-l-qef-astronomy-plus.webp?v=1715808530"},{"product_id":"optolong-l-extreme-f2-fast-optics-dual-narrowband-l-extreme-f2","title":"Optolong L-eXtreme F2 Fast Optics Dual Narrowband 2\" (L-EXTREME-F2)","description":"\u003ch1\u003eOptolong L-eXtreme F2 Fast Optics Dual Narrowband\u003c\/h1\u003e\n\u003cp\u003eOptolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filter that meets the requirements for transmission at continuously varying angles. Astronomically characterised spectral lines (OIII, Ha) as the main transmission wavelengths, the OIII and H-Alpha nebula emission lines pass accurately at f2 - f3.3 Focal Ratio. It's a product that Optolong has developed specifically for fast optical systems, or fast focal ratio imaging systems. It has performed well on RASA, HyperStar and other fast ratio telescopes.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTogether with one-shot colour astronomical cameras, monochrome astronomical cameras, and Digital SLR cameras, you can fast and quickly obtain clear and detailed images of the deep sky;\u003c\/li\u003e\n\u003cli\u003eIdeal for fast optical system, like RASA, Hyperstar and other fast focal ratio telescope users;\u003c\/li\u003e\n\u003cli\u003eRecommended for using fast optical system with focal ratio from f2 to f3.3;\u003c\/li\u003e\n\u003cli\u003eAnti-light pollution、better contrast、more details of the celestial bodies:This filter cuts out background light and noise beyond the target celestial bodies to get better details and contrast of the images. L-eXtreme F2 can effectively block light pollution so that the images will not affected by unwanted lights, and sky light of the background. You can quickly get satisfactory pictures in fast optical systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpectrum and Characteristic\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 1000px;\" cellspacing=\"1\" cellpadding=\"1\" border=\"1\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eSbustrate\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eoptical glass\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eThickness\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e1.85mm\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eFWHM\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eOIII 7nm \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eHa 7nm\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eBlocking range\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e300-1000nm\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eBlocking Depth\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e\u0026gt;OD4\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eSurface quality\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e60\/40\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eTransmitted Wavefront RMS\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eλ\/4\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e Parallelism\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003e30s\u003c\/span\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eBased on the characteristics of celestial bodies’ emission lines and light pollution emission lines, the L-eXtreme F2 retains the prominent nebula OIII and Ha colours while blocking most of the light pollution. Specifically designed and optimally calculated for the characteristics of a fast optical system, the L-eXtreme F2 always keeps both OIII and Ha bands having high transmittance, which helps users to capture nebulae emission lines in these bands more accurately and quickly, and obtain better astrophotographic images.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"1.25\"","offer_id":48076807340261,"sku":"OPT-L-EXTREME-F2-125","price":333.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":48076807307493,"sku":"OPT-L-EXTREME-F2-2","price":431.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/optolong-l-extreme-f2-fast-optics-dual-narrowband-2-l-extreme-f2-astronomy-plus-1.webp?v=1715808525"},{"product_id":"anti-halo-pro-dual-band-2-ha-oiii-filter","title":"Player One Anti-Halo PRO Dual-Band 2″ Ha+OIII filter","description":"\u003ch1 class=\"product_title entry-title\" data-mce-fragment=\"1\"\u003eAnti-Halo PRO Dual-Band 2″ Ha+OIII filter\u003c\/h1\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1931px) 100vw, 1931px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1.jpg 1931w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1-300x140.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1-1024x477.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1-768x358.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1-1536x716.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1-600x280.jpg 600w\" height=\"749\" width=\"1607\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter1.jpg\" class=\"size-full wp-image-6214 aligncenter\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"ast-oembed-container\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/YPfMhKGyK1Y?feature=oembed\" height=\"675\" width=\"1200\" title=\"The BEST New Duo-Narrowband Filter for OSC? Player One Anti-Halo Pro\" allowfullscreen=\"\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch4\u003e\n\u003cstrong\u003eAnti-Halo PRO\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eDual-Band\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e2″\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eHa+OIII filter\u003c\/strong\u003e\n\u003c\/h4\u003e\n\u003cp data-section=\"2\" class=\"tgt\"\u003e\u003cspan data-group=\"2-0\" data-sentence=\"0\" data-section=\"2\" class=\"tgt\"\u003e\u003cstrong\u003eFrame thickness:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebody 5mm+ thread 2.5mm, a total of 7.5mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-section=\"4\" class=\"tgt\"\u003e\u003cspan data-group=\"4-0\" data-sentence=\"0\" data-section=\"4\" class=\"tgt\"\u003e\u003cstrong\u003eFilter glass thickness:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.85mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHa CWL:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e656.3nm     \u003cspan\u003e \u003c\/span\u003e\u003cb\u003eBand\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003eWidth:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e3.7±0.5nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOIII CWL:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e500.7nm    \u003cspan\u003e \u003c\/span\u003e\u003cb\u003eBand Width:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e3.2±0.5nm\u003c\/p\u003e\n\u003cp data-section=\"6\" class=\"tgt\"\u003e\u003cspan data-group=\"6-0\" data-sentence=\"0\" data-section=\"6\" class=\"tgt\"\u003e\u003cstrong\u003eTransmittance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u0026gt;=\u003c\/span\u003e\u003cspan data-group=\"6-1\" data-sentence=\"1\" data-section=\"6\" class=\"tgt\"\u003e85%\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-section=\"8\" class=\"tgt\"\u003e\u003cspan data-group=\"8-0\" data-sentence=\"0\" data-section=\"8\" class=\"tgt\"\u003e\u003cstrong\u003eBlocking depth:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003eOD5 (200-1100nm)\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1929px) 100vw, 1929px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2.jpg 1929w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2-300x140.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2-1024x478.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2-768x359.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2-1536x717.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2-600x280.jpg 600w\" height=\"656\" width=\"1405\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter2.jpg\" class=\"size-full wp-image-6215 aligncenter\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1642px) 100vw, 1642px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3.jpg 1642w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3-300x167.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3-1024x570.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3-768x427.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3-1536x855.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3-600x334.jpg 600w\" height=\"555\" width=\"997\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter3.jpg\" class=\"size-full wp-image-6216 aligncenter\"\u003e\u003c\/p\u003e\n\u003cp\u003eIn recent years, not only the single narrowband filters are chasing narrower band width, but also the dual band filters. From 7nm to 3nm, manufacturing process improved so fast!\u003c\/p\u003e\n\u003cp\u003eBut one thing is missing, halo control! The halo around stars is like a nightmare when you shoot some famous deepsky object!\u003c\/p\u003e\n\u003cp\u003eWhy only chasing super narrow bandwidth, but not deal with the halos?\u003c\/p\u003e\n\u003cp\u003eThe reason is, halo control is hardest part in manufacturing.\u003c\/p\u003e\n\u003cp\u003eMost people get used of it!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUntil now!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1958px) 100vw, 1958px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4.jpg 1958w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4-300x142.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4-1024x486.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4-768x364.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4-1536x729.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4-600x285.jpg 600w\" height=\"701\" width=\"1478\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter4.jpg\" class=\"size-full wp-image-6217 aligncenter\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1544px) 100vw, 1544px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss.jpg 1544w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss-300x154.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss-1024x527.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss-768x395.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss-1536x790.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss-600x309.jpg 600w\" height=\"664\" width=\"1291\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter5ss.jpg\" class=\"aligncenter size-full wp-image-6265\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1925px) 100vw, 1925px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6.jpg 1925w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6-300x149.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6-1024x510.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6-768x382.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6-1536x764.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6-600x299.jpg 600w\" height=\"831\" width=\"1670\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter6.jpg\" class=\"size-full wp-image-6219 aligncenter\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1946px) 100vw, 1946px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7.jpg 1946w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7-300x147.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7-1024x502.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7-768x377.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7-1536x753.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7-600x294.jpg 600w\" height=\"755\" width=\"1540\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter7.jpg\" class=\"size-full wp-image-6220 aligncenter\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 1924px) 100vw, 1924px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9.png 1924w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9-300x144.png 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9-1024x490.png 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9-768x368.png 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9-1536x735.png 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9-600x287.png 600w\" height=\"806\" width=\"1684\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter9.png\" class=\"aligncenter size-full wp-image-6277\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 2988px) 100vw, 2988px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3.png 2988w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-300x109.png 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-1024x372.png 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-768x279.png 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-1536x558.png 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-2048x744.png 2048w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3-600x218.png 600w\" height=\"666\" width=\"1833\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/Anti-Halo-PRO-2-inch-Dual-Band-filter-Curve-ZOOM3.png\" class=\"alignnone size-full wp-image-6320\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-section=\"8\" class=\"tgt\"\u003e\u003cimg sizes=\"(max-width: 2477px) 100vw, 2477px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5.jpg 2477w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-300x255.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-1024x871.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-768x653.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-1536x1306.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-2048x1741.jpg 2048w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5-600x510.jpg 600w\" height=\"1335\" width=\"1570\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/DB-HAOIII-2-5.jpg\" class=\"alignnone size-full wp-image-6222\"\u003e\u003c\/p\u003e\n\u003ch3 data-section=\"8\"\u003e\u003cstrong\u003eVega testing of halo control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eLuke use his 8″ F4 Newtonian and Canon 700D to test Anti-Halo Pro dual-band filter, the target is Vega (Zero magnitude star), exposure 120sec. We can see there is no halo around Vega, the off axis big halo is the reflection of the lens in coma corrector.\u003c\/p\u003e\n\u003ch3 data-section=\"8\"\u003e\u003cimg sizes=\"(max-width: 1500px) 100vw, 1500px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2.jpg 1500w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2-300x200.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2-1024x684.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2-768x513.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2-600x401.jpg 600w\" height=\"496\" width=\"743\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342968263_1005227124220133_2113089985259008154_n2.jpg\" class=\"size-full wp-image-6361 aligncenter\"\u003e\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-section=\"8\"\u003e\u003cstrong\u003eUsers Work:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 2560px) 100vw, 2560px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-scaled.jpg 2560w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-300x199.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-1024x679.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-768x509.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-1536x1018.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-2048x1357.jpg 2048w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-600x398.jpg 600w\" height=\"1315\" width=\"1983\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/ESPRIT120Anti-Halo-Pro-Dual-band-filter-Poseidon-C-scaled.jpg\" class=\"alignnone size-full wp-image-6224\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNGC7822\u003c\/strong\u003e, Luke Newbould, Esprit120APO+Anti-Halo Pro Ha+OIII filter + Poseidon-C Pro\u003c\/p\u003e\n\u003cp\u003e\u003cimg sizes=\"(max-width: 2560px) 100vw, 2560px\" srcset=\"https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-scaled.jpg 2560w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-300x207.jpg 300w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-1024x705.jpg 1024w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-768x529.jpg 768w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-1536x1058.jpg 1536w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-2048x1410.jpg 2048w, https:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-600x413.jpg 600w\" height=\"1258\" width=\"1826\" alt=\"\" src=\"http:\/\/player-one-astronomy.com\/wp-content\/uploads\/2023\/04\/342684666_265696509131976_728422230206237110_n-scaled.jpg\" class=\"alignnone size-full wp-image-6354\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNGC7000\u003c\/strong\u003e, Luke Newbould, Redcat 51APO+Anti-Halo Pro Ha+OIII filter + Canon 700D\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch4\u003e\n\u003cstrong\u003eAnti-Halo PRO\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eDual-Band\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e2″\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003eHa+OIII filter\u003c\/strong\u003e\n\u003c\/h4\u003e\n\u003cp class=\"tgt\" data-section=\"2\"\u003e\u003cspan class=\"tgt\" data-section=\"2\" data-sentence=\"0\" data-group=\"2-0\"\u003e\u003cstrong\u003eFrame thickness:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebody 5mm+ thread 2.5mm, a total of 7.5mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"tgt\" data-section=\"4\"\u003e\u003cspan class=\"tgt\" data-section=\"4\" data-sentence=\"0\" data-group=\"4-0\"\u003e\u003cstrong\u003eFilter glass thickness:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e1.85mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eHa CWL:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e656.3nm     \u003cspan\u003e \u003c\/span\u003e\u003cb\u003eBand\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003eWidth:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e3.7±0.5nm\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOIII CWL:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e500.7nm    \u003cspan\u003e \u003c\/span\u003e\u003cb\u003eBand Width:\u003cspan\u003e \u003c\/span\u003e\u003c\/b\u003e3.2±0.5nm\u003c\/p\u003e\n\u003cp class=\"tgt\" data-section=\"6\"\u003e\u003cspan class=\"tgt\" data-section=\"6\" data-sentence=\"0\" data-group=\"6-0\"\u003e\u003cstrong\u003eTransmittance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u0026gt;=\u003c\/span\u003e\u003cspan class=\"tgt\" data-section=\"6\" data-sentence=\"1\" data-group=\"6-1\"\u003e85%\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"tgt\" data-section=\"8\"\u003e\u003cspan class=\"tgt\" data-section=\"8\" data-sentence=\"0\" data-group=\"8-0\"\u003e\u003cstrong\u003eBlocking depth:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003eOD5 (200-1100nm)\u003c\/p\u003e\n\u003cp class=\"tgt\" data-section=\"8\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"tgt\" data-section=\"8\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eAnti-Halo Filter\u003c\/p\u003e\n\u003cp\u003eFilter Case\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/player-one-warranty\" target=\"_blank\"\u003ePlayer one 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Player One","offers":[{"title":"Default Title","offer_id":44461179633893,"sku":"PO-AHP-HO-2","price":699.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/player-one-anti-halo-pro-dual-band-2-ha-oiii-filter-astronomy-plus.png?v=1715808517"},{"product_id":"askar-colour-magic-c1-c2-duo-band-filter","title":"Askar Colour Magic C1 \u0026 C2 Duo-Band Filter","description":"\u003ch2\u003eAskar Colour Magic C1 \u0026amp; C2 Duo-Band Filter\u003c\/h2\u003e\n\u003cp\u003eColour Magic C1 Duo-band filter (Hα+OIII) has a high transmittance of over 90% at its center wavelength (500.7nm and 656.6nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing the contrast throughout the image， enhancing the contrast of your pictures, and making it easier to display the details of the stars. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect\u003c\/p\u003e\n\u003cp\u003eWhen shooting deep-sky galaxies with color cameras, a duo-band filter in the Hα +OⅢ bands is often used; whereas with a mono camera, a narrowband filter in the Hα, SⅡ, and OⅢ bands is often used, leaving users with color cameras missing one band of nebula detail. This can be compensated by using the Colour Magic C Duo-band filter (SⅡ+OIII) mentioned above.\u003c\/p\u003e\n\u003cp\u003eColour Magic C2 Duo-band filter (SII+OIII) has a high transmittance of over 90% at its center wavelength (500.7nm and 672nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing the contrast throughout the image， enhancing the contrast of your pictures, and making it easier to display the details of the stars. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.\u003c\/p\u003e\n\u003cp\u003eUsing the Colour Magic 2” C duo-band filter package can effectively improve the contrast of the image, making it easier to bring out the detailed features of objects that would otherwise be difficult to capture. It'll be able to take high-quality deep-sky images even in areas affected by urban light pollution and other light sources.\u003c\/p\u003e\n\u003cp\u003eWe name the Hα+OⅢ Duo-band filter “C1”, and the SⅡ+OⅢ as “C2”, so their combination is the Colour Magic C 2\" Duo-band filter package. It enables color camera users to shoot without the mono camera and H\/S\/O narrowband filter, providing more fun of astrophotography.\u003c\/p\u003e\n\u003cp\u003eWith efficient and excellent imaging performance and, a fun and innovative shooting experience, let Colour Magic C duo-band filters become your great tool to capture the beautiful moments of the universe!\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAskar C1 Duo-band Filter (OIII \u0026amp; Ha) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eFWHM:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003eOIII：35nm±5nm\/Ha：15nm±3nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eCWL:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e500.7nm \u0026amp; 656.6nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003ePeak transmittance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e90%\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eThickness:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e2 ± 0.05mm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eBarrier property:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003eOD3 @ 200-1000nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eSurface finish:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e60\/40\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAskar C2 Duo-band Filter (OIII \u0026amp; SⅡ) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eFWHM:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003eOIII：35nm±5nm\/SⅡ：15nm±3nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eCWL:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e500.7nm \u0026amp; 672nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003ePeak transmittance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e90%\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eThickness:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e2 ± 0.05mm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eBarrier property:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003eOD3 @ 200-1000nm\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e\u003cstrong\u003eSurface finish:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ql-align-center\"\u003e60\/40\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFilter \/ Filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Colour Magic C1 Duo-band Filter (Hα+OIII)","offer_id":44497849254117,"sku":"ASK-CM-C1","price":166.0,"currency_code":"CAD","in_stock":true},{"title":"Colour Magic C2 Duo-band Filter (SII+OIII)","offer_id":44497849286885,"sku":"ASK-CM-C2","price":166.0,"currency_code":"CAD","in_stock":true},{"title":"Colour Magic C 2\" Duo-band Filter Package","offer_id":44497849319653,"sku":"ASK-CM-C1+C2","price":315.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/askar-colour-magic-c1c2-duo-band-filter-astronomy-plus-1.webp?v=1715808465"},{"product_id":"baader-solar-continuum-filter-7-5nm-540nm","title":"Baader Solar Continuum Filter 7.5nm (540nm)","description":"\u003ch2 class=\"product-title\"\u003eBaader Solar Continuum Filter 7.5nm (540nm)\u003c\/h2\u003e\n\u003cp\u003eFor Visual and Photographic Observations of the Sun\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaader 7.5 nm Solar Continuum Filter, CWL 540nm\u003c\/li\u003e\n\u003cli\u003eA must for owners of achromatic refractors. This narrowband-filter cuts the spectral range where lens optics draw sharpest and contrastiest. The Baader Solar Continuum Filter lets you use the full power of your telescope.\u003c\/li\u003e\n\u003cli\u003eEnhances contrast and reduces the effect of atmospheric turbulence \u003cstrong\u003e(in combination with white light solar filters)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnormous contrast gain in monochrome photography even on apochromatic systems\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003eImportant note: The Solar Continuum Filter must be used ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Film)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Solar Continuum Filter is practically a narrow band photosphere filter for solar observation in white light. It provides the highest contrast in the photosphere of the sun. The filter works as a monochromator: suppressing the effects of the atmospheric turbulence and delivering images that are significantly sharper.\u003c\/p\u003e\n\u003cp\u003eLens systems - including those of apochromats, catadioptrics, or eyepieces - are traditionally optimized for the spectral range around 540nm, since this is where our eye has the highest sensitivity. This narrowband filter therefore blocks everything with the exception of the spectral range in which a lens optic works most sharply and with the highest contrast. The effect is greatest on achromatic lens telescopes; but there is also an effect on apochromatic telescopes, catadioptric systems, and even pure mirror systems by reducing air turbulence.\u003c\/p\u003e\n\u003cp\u003eAs a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emonochromatic filter, it is ideal for use on monochromatic cameras\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand can even provide a tremendous gain on pure color systems.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"750\" width=\"578\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0267\/1172\/0013\/files\/01-ND09.jpg?v=1667762944\"\u003e\u003c\/p\u003e\n\u003cp\u003eWith a color camera, as with deep-sky narrow-band photography, it is less effective as only the green pixels are used. Thus, although you still benefit from the improved image sharpness of the telescope that is optimized for green wavelengths (and the reduction of the influences of air turbulence), with a color camera you cannot fully exploit the better image quality compared to monochrome cameras, as you are effectively working with reduced camera resolution.\u003c\/p\u003e\n\u003cp\u003eCompared to the previous model with a 10nm half-band-width, this filter has a half-band-width of only 7.5nm, which increases the contrast even more. It thus replaces both the previous Baader 10nm Solar Continuum filter and the stacked 1 ¼\" filter #2458392. The single filter is so good that stacking is no longer necessary - the contrast gain of a single 7.5nm filter makes stacking unnecessary, and this performance is now also available in 2\".\u003c\/p\u003e\n\u003cp\u003eThe Baader 7.5nm Solar Continuum filter is also be included in the scope of delivery of the Cool Ceramic Herschel prism Mark II, which is in preparation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Baader 7.5 nm Solar Continuum also offers all the advantages of the CMOS-optimized Baader filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased contrast, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003e1.25\"\u003c\/h2\u003e\n\u003ctable style=\"height: 325px;\" id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eSKU (#)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e\u003cspan\u003e2961580\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eEAN CODE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e\u003cspan\u003e4047825048196\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e0.06\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e535 – 545 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 39px;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 39px;\"\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e7.5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e540 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 39px;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 39px;\"\u003e\u003cspan\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e1 25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003e\u003cspan\u003eCMOS, Contrast Enhancement, Solar\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19px;\"\u003e\n\u003cth class=\"label\" style=\"width: 226.859px; height: 19px;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 303.141px; height: 19px;\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003e2\"\u003c\/h2\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eSKU (#)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e\u003cspan\u003e2961581\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eEAN CODE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e\u003cspan\u003e4047825048202\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eWEIGHT (KG)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e0.06\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e535 – 545 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eHBW (HALFBANDWIDTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e7.5nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e540 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e\u003cspan\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003e\u003cspan\u003eCMOS, Contrast Enhancement, Solar\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\" style=\"width: 226.453px;\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd class=\"data\" style=\"width: 302.547px;\"\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch6\u003e\u003cbr\u003e\u003c\/h6\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eBaader Solar Continuum Filter 7.5nm (540nm), at selected size :\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\"\u003c\/li\u003e\n\u003cli\u003e2\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLimited-Lifetime-Warranty for CMOS-optimized Baader filters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings.\u003c\/p\u003e\n\u003cp\u003eBaader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from misuse, physical damage through improper handling, or improper cleaning.\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":44780627689701,"sku":"BAA-FSOL-1N (Baader #2961580)","price":172.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44780627722469,"sku":"BAA-FSOL-2N (Baader #2961581)","price":289.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/baader-solar-continuum-filter-7-5nm-540nm-astronomy-plus.png?v=1715808195"},{"product_id":"antlia-triband-rgb-ii-ultra-filter-rgb-ii","title":"Antlia Triband RGB II Ultra Filter (RGB-II)","description":"\u003ch1\u003e\n\u003cspan\u003eAntlia Triband RGB II Ultra Filter\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe Antlia Triband RGB Ultra Filter II adds the H-Beta 486.1nm line to the Triband RGB Ultra, enhancing its ability to capture finer details of nebulae. It is designed for light pollution suppression for OSC and Mono cameras. The spectral design selected the most substantial information in the RGB bands, which makes Antlia Triband RGB Ultra Filter II possible to shoot over 90% of deep sky objects, in addition to its excellent performance on emission nebula, different from other ultra-narrowband filters, it is able to capture galaxies, reflection nebulae, and star clusters from a Bortle 8 location to Bortle 1 while presenting more balanced RGB colors in your images. Also, it has a broad bandpass designed to cope with faster optics up to the f\/2 focal ratio\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication and Performance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eIt is workable to shoot galaxies, reflection nebulae and star clusters.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRefined coating process makes the Triband RGB Ultra filters II with excellent halo suppression and improved signal-to-noise performance.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIt has been specifically designed for balanced color transmission using Antlia's experience in spectrum design.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe balanced transmission allows the minimal color cast to broadband emission objects such as stars, galaxies, and globular clusters.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe Triband RGB Ultra II can be used with nearly all systems as fast as f\/2 with minimal loss of efficiency or shifts in spectral response.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFor visual use, Triband RGB Ultra filter II ensures the high transmittance of the HSOHb emission lines and can be used for observing deep-sky objects with large-diameter telescopes.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe Triband RGB Ultra II is able to better isolate the H-alpha, O3 and blue spectrum from the background light pollution.\u003cbr\u003eThe filter provides excellent flexibility and compatibility with both OSC and Mono camera systems.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIt facilitates the imaging of most astronomical objects using all optical configurations down to f\/2 focal ratio.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWhen shooting LRGB with mono cameras, unless you are wanting to image LDN (dark nebulae) the \u003c\/span\u003e\u003cspan\u003eTriband RGB Ultra II can be used as a luminance filter replacement for objects such as nebulae and galaxies to improve contrast and signal to noise ratio\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSize Available: 2’’ mounted\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; font-family: Calibri; font-size: 11pt; color: rgb(0, 0, 0); background-color: transparent; width: 100%; height: 239.336px;\" 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cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 20.8398px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: nowrap; text-align: left; vertical-align: bottom; border-bottom: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; font-weight: bold; vertical-align: baseline;\"\u003eSpectrum Specifications:\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 20.8398px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 20.8398px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 20.8398px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 20.8398px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 20.8398px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 38.75px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: left; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"vertical-align: baseline;\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 12pt; font-weight: bold; vertical-align: baseline;\"\u003eH-alpha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eS-II\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eO-III\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eH-beta\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 38.75px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10pt; font-weight: bold; vertical-align: baseline;\"\u003eNII\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.8398px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 41.6796px;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eWavelength\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 41.6796px;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e656.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e671.6nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e495.9nm,\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 41.6796px;\" rowspan=\"2\" colspan=\"1\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e486.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e658.3nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.8398px;\"\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e673.1nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e500.7nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-left: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e654.8nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 49.7461px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003ePeak Transmission\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\n\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e92%\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e\u003cspan style=\"font-family: Microsoft YaHei; font-size: 10.5pt; vertical-align: baseline;\"\u003e＞\u003c\/span\u003e92%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20.8398px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 20.8398px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eBlocking\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 20.8398px;\" rowspan=\"1\" colspan=\"5\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e≥OD4@ 300-1050nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 49.7461px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: normal; text-align: center; vertical-align: middle; border: 1px solid rgb(167, 167, 167); height: 49.7461px;\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003eFilter Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 71.0572%; white-space: normal; text-align: center; vertical-align: middle; border-right: 1px solid rgb(167, 167, 167); border-bottom: 1px solid rgb(167, 167, 167); border-top: 1px solid rgb(167, 167, 167); height: 49.7461px;\" rowspan=\"1\" colspan=\"5\"\u003e\u003cspan style=\"font-family: Arial; font-size: 10.5pt; vertical-align: baseline;\"\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 17.7344px;\"\u003e\n\u003ctd style=\"width: 29.2894%; white-space: nowrap; text-align: left; vertical-align: bottom; border-top: 1px solid rgb(167, 167, 167); height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 14.2114%; height: 17.7344px;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSpectrum Curve:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2025_Triband_RGB_II_Filter_Spectrum_Curve.jpg?v=1737232345\" width=\"1071\" height=\"706\"\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eFilter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFilter Case\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAntlia 3-Years Warranty Against Delamination\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45731966615781,"sku":"AF-RGB-II","price":254.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ABUIABACGAAgrf6BnAYorJj-lQUwsAk4sAk.jpg?v=1777043368"},{"product_id":"antlia-new-solar-discover-dualband-ha-cak-and-cah-standard","title":"Antlia Solar Discover Dualband（Ha, CaK and CaH) - Standard (SD-DUAL-STD)","description":"\u003ch1\u003eAntlia Solar Discover Dualband（Ha, CaK and CaH) - Standard\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband (Ha, CaK, and CaH) filter assembly comes in both standard and mini versions. It is specifically designed for solar photosphere photography, effectively enhancing contrast and sharpness in solar imaging. This results in greater visibility of surface details and highlights of sunspots, while also providing higher contrast for solar faculae.\u003c\/p\u003e\n\u003cp\u003eThe complete assembly comes with a Antlia Energy Rejection Filter (ERF) filter, functions to block UV and IR light, which allows the desired wavelengths Ha 656.3nm, CaK 393.3nm, and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003eIn addition, necessary ND filter is already manufacture installed in the tube.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- New tube structure design is used for the Antlia Solar Discover Dualband filter assembly，installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The filters are assembled in a fully closed tube and the metal tube machined from aircraft aluminum CNN and oxidized. No stray light can escape from this.\u003c\/p\u003e\n\u003cp\u003e- Compared to other solar reducing films, the Antlia Solar Discover Dualband filter assembly offers superior advantages: it enables higher contrast for solar imaging, higher resolution of the solar surface, and the design less susceptible to wear and tear. Additionally, it's user-friendly, ensuring ease of use, and boasts an extended lifespan for your equipments used for solar imaging.\u003c\/p\u003e\n\u003cp\u003e- It can be directly used for solar Photosphere imaging, such as sunspots.\u003c\/p\u003e\n\u003cp\u003e- 1.25\" and 2\" Adapters\u003c\/p\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband Ha, CaK and CaH filter assembly combines the 1.25'' and 2'' adapter used in astrophotography for easier and faster connection of telescopes and cameras. The standard version is compatible with both 1.25'' and 2'' adapters, while the mini version is designed with 1.25'' adapter.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Installation Diagram:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"Installation Diagram.jpg\" height=\"667\" width=\"1000\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgp6PrrwYopv_H7QEw6Ac4mwU.jpg\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant Notes:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e- \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eWhen you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- When you are using a telescope with an aperture ＞100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover Dualband Ha, CaK and CaH filter Assembly; If without the extra light reduction solution, the Solar Discover Discover Dualband Assembly can only used with REFRACTORS up to 100mm aperture.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Visual Observation \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https:\/\/eclipse.aas.org\/eye-safety\/iso12312-2).\u003c\/p\u003e\n\u003cp\u003eFor tough technical requirements and safety considerations, we do not recommend Solar Discover Dualband Ha, CaK and CaH filter assembly for visual observation. If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.\u003c\/p\u003e\n\u003cp\u003e\u003cimg class=\"jz-image-viewer__img urst-none wh-auto ht-auto\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgjanrrwYo26bxMTDiCjjyBQ.jpg\" alt=\"\" data-v-4f7c66ef=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cimg class=\"jz-image-viewer__img urst-none wh-auto ht-auto\" src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgqKPrrwYoq4TYqQYw6Ac46Ac.jpg\" alt=\"\" data-v-4f7c66ef=\"\"\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eTechnical  Specification\u003c\/h3\u003e\n\u003ctable width=\"676\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" valign=\"center\" width=\"372\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eISO12312-2 Transmittance Requirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntlia Transmittance Requirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e(\u003c\/span\u003e\u003cspan\u003eSolar Discover 5Å CaK\u003c\/span\u003e\u003cspan\u003e， Solar Discover 3nm CaK Assembly，\u003c\/span\u003e\u003cspan\u003eDualband Ha, CaK and CaH filter Assembly，ERF\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRequirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eValue\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWavelength Range\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWavelength Range\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e380-780nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd rowspan=\"2\" valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e380-780nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmin%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.000061%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（UVB）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e280-315nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e280-315nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（UVA）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e315-380nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e315-380nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（IR）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"116\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e3%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"141\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e780-2000nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"303\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e780-1700nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSolar Discover Dualband（Ha, CaK and CaH) - Standard\u003c\/p\u003e\n\u003cp\u003e1,25\" and 2\" adapter\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia 3-years\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange\u003c\/p\u003e\n\u003cp\u003efor this item is not accepted once it has been disassembled.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45745300865253,"sku":"AF-SD-DUAL-STD","price":212.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ABUIABACGAAgwaPrrwYosaic1wcw6Ac46Ac.jpg?v=1777043371"},{"product_id":"antlia-new-solar-discover-dualband-ha-cak-and-cah-mini-sd-dual-mini","title":"Antlia Solar Discover Dualband（Ha, CaK and CaH) - Mini (SD-DUAL-MINI)","description":"\u003ch1\u003eAntlia Solar Discover Dualband（Ha, CaK and CaH) - Mini\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband (Ha, CaK, and CaH) filter assembly comes in both standard and mini versions. It is specifically designed for solar photosphere photography, effectively enhancing contrast and sharpness in solar imaging. This results in greater visibility of surface details and highlights of sunspots, while also providing higher contrast for solar faculae.\u003c\/p\u003e\n\u003cp\u003eThe complete assembly comes with a Antlia Energy Rejection Filter (ERF) filter, functions to block UV and IR light, which allows the desired wavelengths Ha 656.3nm, CaK 393.3nm, and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003eIn addition, necessary ND filter is already manufacture installed in the tube.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- New tube structure design is used for the Antlia Solar Discover Dualband filter assembly，installation is similar to the Antlia CaK 3nm Solar Herschel Wedge, with the telescope attached at one end and the camera at the another. The filters are assembled in a fully closed tube and the metal tube machined from aircraft aluminum CNN and oxidized. No stray light can escape from this.\u003c\/p\u003e\n\u003cp\u003e- Compared to other solar reducing films, the Antlia Solar Discover Dualband filter assembly offers superior advantages: it enables higher contrast for solar imaging, higher resolution of the solar surface, and the design less susceptible to wear and tear. Additionally, it's user-friendly, ensuring ease of use, and boasts an extended lifespan for your equipments used for solar imaging.\u003c\/p\u003e\n\u003cp\u003e- It can be directly used for solar Photosphere imaging, such as sunspots.\u003c\/p\u003e\n\u003cp\u003e- 1.25\" and 2\" Adapters\u003c\/p\u003e\n\u003cp\u003eThe Antlia Solar Discover Dualband Ha, CaK and CaH filter assembly combines the 1.25'' and 2'' adapter used in astrophotography for easier and faster connection of telescopes and cameras. The standard version is compatible with both 1.25'' and 2'' adapters, while the mini version is designed with 1.25'' adapter.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Installation Diagram:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgp6PrrwYopv_H7QEw6Ac4mwU.jpg\" width=\"1000\" height=\"667\" alt=\"Installation Diagram.jpg\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant Notes:\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e- \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eWhen you are using a zenith mirror, the ERF filter must be installed in the correct position for safe operation. Please refer to the installation diagram.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e- When you are using a telescope with an aperture ＞100mm, you need to use additional light reduction solutions, such as ERF filters，solar safety films, lowering the telescope aperture for safe operation while using Solar Discover Dualband Ha, CaK and CaH filter Assembly; If without the extra light reduction solution, the Solar Discover Discover Dualband Assembly can only used with REFRACTORS up to 100mm aperture.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDue to different batches, the mini version will have 2 appearances, the function and installation are the same.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Visual Observation \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe IR coating range of our products is slightly different from the ISO 12312-2 Standard for Solar Viewers, please see the following chart and refer to ISO 12312-2 Standard for Solar Viewers (https:\/\/eclipse.aas.org\/eye-safety\/iso12312-2).\u003c\/p\u003e\n\u003cp\u003eFor tough technical requirements and safety considerations, we do not recommend Solar Discover Dualband Ha, CaK and CaH filter assembly for visual observation. If you need to use the product for visual observation, it is important to ensure that all filters built into the assembly are in good condition for safety.\u003c\/p\u003e\n\u003cp\u003ePlease contact Antlia if you have any question.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/20564242.s21i.faiusr.com\/2\/2\/ABUIABACGAAgjanrrwYo26bxMTDiCjjyBQ.jpg\" width=\"1378\" height=\"754\" alt=\"Antlia Solar Discover Dualband (1).jpg\" class=\"need_fix\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"676\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"372\" valign=\"center\" colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eISO12312-2 Transmittance Requirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntlia Transmittance Requirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e(\u003c\/span\u003e\u003cspan\u003eSolar Discover 5Å CaK\u003c\/span\u003e\u003cspan\u003e， Solar Discover 3nm CaK Assembly，\u003c\/span\u003e\u003cspan\u003eDualband Ha, CaK and CaH filter Assembly，ERF\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRequirements\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eValue\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"141\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWavelength Range\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWavelength Range\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"141\" valign=\"center\" rowspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e380-780nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\" rowspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e380-780nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmin%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.000061%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（UVB）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"141\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e280-315nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e280-315nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（UVA）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.0032%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"141\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e315-380nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e315-380nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTmax%（IR）\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"116\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e3%\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"141\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e780-2000nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"303\" valign=\"center\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e780-1700nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSolar Discover Dualband（Ha, CaK and CaH) - Mini (SD-DUAL-MINI)\u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia 3-years\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange\u003c\/p\u003e\n\u003cp\u003efor this item is not accepted once it has been disassembled.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45745366401253,"sku":"AF-SD-DUAL-MINI","price":120.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ABUIABACGAAgtaPrrwYo1rqerAEw6Ac46Ac.jpg?v=1777043371"},{"product_id":"antlia-new-solar-discover-dualband-energy-rejection-filter-erf","title":"Antlia Solar Discover Dualband Energy Rejection Filter (ERF)","description":"\u003ch1\u003eAntlia Solar Discover Dualband Energy Rejection Filter (ERF)\u003c\/h1\u003e\n\u003cp\u003eThe Antlia Dualband Solar Energy Rejection Filter is designed by combining Hydrogen Alpha, Calcium K-Line and Calcium H-Line in one dualband filter. It is the filter used in conjunction with Antlia Solar Discover 3nm CaK, Solar, 5Å CaK or similar product to protect your solar imaging equipments from high temperature and bandpass shifting by rejecting massive heat before it enters telescope when imaging and observing solar.\u003c\/p\u003e\n\u003cp\u003eThey are very effective at blocking UV and IR light, and allow the desired wavelengths Ha 656.3nm, CaK 393.3nm and CaH 396.8nm to pass through.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- FWHM 25nm with CWL at H-alpha wavelength of 656.3nm; Transmission: T＞95%\u003c\/p\u003e\n\u003cp\u003e- FHWM 25nm with CWL at CaK wavelength 393.3nm covering Calcium K-Line 393.3nm and Calcium K-Line 396.8nm; Transmission: T＞90%\u003c\/p\u003e\n\u003cp\u003e- Coating Range: 200-1700nm wavelengths\u003c\/p\u003e\n\u003cp\u003e- Finished with the most advanced multicoatings\u003c\/p\u003e\n\u003cp\u003e- Coated on heat resistant double-polished substrate\u003c\/p\u003e\n\u003cp\u003e- Antlia ERF 130mm, 150mm，200mm filters are mounted in a housing\/cell to hold it in front of the telescope\u003c\/p\u003e\n\u003cp\u003e- Antlia ERF 2’’ mounted filter is installed on the back end of the refractor telescope\u003c\/p\u003e\n\u003cp\u003e- Transmitted Wavefront: Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"http:\/\/20564242.s21i.faiusr.com\/4\/2\/ABUIABAEGAAgurvrrwYov732ZzCPCjjgBQ.png\" width=\"1133\" height=\"644\" alt=\"Antlia dualband ERF spectrum.JPG\" class=\"need_fix\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Notes: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- The Antlia Dual ERF filters cannot be used on its own. It must be used together with the professionally made solar imaging equipments, which have their own complete blocking filters assembled. Such as Antlia Solar Discover 5Å CaK, Solar Discover 3nm CaK Assembly, Dualband Ha, CaK and CaH filter Assembly;\u003c\/p\u003e\n\u003cp\u003e- Please do not use the Antlia Dualband ERF filter by itself for visual observation;\u003c\/p\u003e\n\u003cp\u003e- 2’’ ERF filter must working on 110mm or smaller refractors.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"633\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eAntlia Dual ERF Filter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003eH-alpha\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003eCaK \u0026amp; CaH\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003e25nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003e25nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003eHa \u003cspan name=\"OLE_LINK3\"\u003e656.\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e3\u003c\/span\u003e\u003cspan\u003enm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003eCaK 393nm covering \u003c\/span\u003e\u003cspan\u003eCaK 393.3nm \u0026amp; CaH 396.8nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003ePeak Transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"153\"\u003e\n\u003cp\u003e\u003cspan\u003e9\u003c\/span\u003e\u003cspan\u003e0\u003c\/span\u003e\u003cspan\u003e%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" width=\"309\"\u003e\n\u003cp\u003e\u003cspan\u003e90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eCoating Range\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003e200-1700nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003e10mm+\/-0.05mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"center\"\u003e\n\u003cp\u003e\u003cspan\u003eSize\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"center\" width=\"462\"\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e130\u003c\/span\u003e\u003cspan\u003emm with cell\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor \u003c\/span\u003e\u003cspan\u003e130-190mm\u003c\/span\u003e\u003cspan\u003e \u003cspan name=\"OLE_LINK4\"\u003eF\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003eixed diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e 150mm with \u003c\/span\u003e\u003cspan\u003ecell,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor 1\u003c\/span\u003e\u003cspan\u003e50-220mm\u003c\/span\u003e\u003cspan\u003e Fixed diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eERF glass\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003e200\u003c\/span\u003e\u003cspan\u003emm with cell\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003efor \u003c\/span\u003e\u003cspan\u003e200-250mm\u003c\/span\u003e\u003cspan\u003e Fixed diameter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSolar Discover Dualband Energy Rejection Filter (ERF), at selected size :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2\"\u003c\/li\u003e\n\u003cli\u003e130mm\u003c\/li\u003e\n\u003cli\u003e150mm\u003c\/li\u003e\n\u003cli\u003e200mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual \u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/antlia-filters-warranty?_pos=1\u0026amp;_psq=antlia+warran\u0026amp;_ss=e\u0026amp;_v=1.0\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan\u003eWarranty: 3-years\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisassembly of the assembly is prohibited and voids warranty. Any repair\/returns\/exchange\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003efor this item is not accepted once it has been disassembled.\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Antlia","offers":[{"title":"2\"","offer_id":45745460543717,"sku":"AF-ERF-2","price":120.0,"currency_code":"CAD","in_stock":true},{"title":"130mm","offer_id":45745460576485,"sku":"AF-ERF-130","price":1367.0,"currency_code":"CAD","in_stock":true},{"title":"150mm","offer_id":45745460609253,"sku":"AF-ERF-150","price":1781.0,"currency_code":"CAD","in_stock":true},{"title":"200mm","offer_id":45745460642021,"sku":"AF-ERF-200","price":3233.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ABUIABACGAAg8LfrrwYo2Oq7ygIw6Ac46Ac.jpg?v=1777043371"},{"product_id":"svbony-sv240-multi-narrowband-filter-galaxy-nebula-nir-near-infrared-light-pollution-2-mounted-for-urban-astrophotography-w9191a","title":"SVBONY SV240 Multi-Narrowband Filter Galaxy \u0026 Nebula Near-infrared Light Pollution","description":"\u003ch1\u003eSVBONY SV240 Multi-Narrowband Filter Galaxy \u0026amp; Nebula Near-infrared Light Pollution \u003c\/h1\u003e\n\u003cp\u003eSVBONY SV240 multi-bandpass filter is designed for urban astrophotography; it can isolate the Ha; OIII; and H-Beta from the background light pollution efficiently; you can astrophotography in urban without a long struggle to suburbs; save your time and high efficiency; and it is suitable for photoing most galaxies; reflection nebulae; emission nebula; and star clusters; and so on. \u003c\/p\u003e\n\u003ch2\u003eCut-off Depth ≥ OD4\u003c\/h2\u003e\n\u003cp\u003eHighly efficient in blocking urban light pollution or other background light; use this multi-bandpass filter for astrophotography in urban without traveling long distances to the suburbs. The SV240 narrowband filter can block the influence of urban light pollution and other background lights efficiently. \u003c\/p\u003e\n\u003cp\u003eFWHM; 24nm; 20 nm; 115 nm; the wide wavelength and high transmittance of this multi-bandpass filters in Ha; OIII; H-Beta wavelength helps the colorful image photoing.\u003c\/p\u003e\n\u003ch1\u003eResistant of BORTLE 8\u003c\/h1\u003e\n\u003cp\u003eThe multilayer coating design for the remarkable performance in tacking light pollution and high transmittance in core wavelength. Astrophotography in urban comfortable. The strong ability to tacking light pollution up to BORTLE 8 allows it can be used in multiple cities, and no need to go to the suburbs. Time and labor saving.\u003c\/p\u003e\n\u003ch2\u003eWavelength Range of The Filter\u003c\/h2\u003e\n\u003cp\u003eThe wide range allows the filter to be used in multiple scenarios. Stronger resistance to light pollution. Near IR (NIR) is blocked up to 1100nm. High ability to process the wavelength from 300 to 1100nm. Effectively isolate the light pollution band.\u003c\/p\u003e\n\u003ch2\u003ePhotography All Kinds of Targets\u003c\/h2\u003e\n\u003cp\u003eThe wavelength can meet the astrophotography needs of most galaxies, reflection nebulae, emission nebula, star clusters, and other broad-spectrum targets. And the targets can be captured in a short time, which is widely used and high efficiency. \u003c\/p\u003e\n\u003cp\u003eIf you have different astrophotography systems, no need to prepare dedicated filters; one SV240 can meet your needs due to its high compatibility. Considering the high quantum efficiency (QE) characteristics of the latest cameras (such as IMX585 and IMX464) in the near-infrared region and also this region less susceptible to artificial light pollution, the SV240 multi-narrowband filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves the image signal-to-noise ratio and contrast by capturing signal in visible bands and NIR regions while maintaining good colour balance and being easier to manage in post-processing.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCut-off depth ≥OD4; highly efficient in blocking urban light pollution or other background light; use this multi-bandpass filter for astrophotography in urban without traveling long distances to the suburbs;\u003c\/li\u003e\n\u003cli\u003eCompatible with 99% astrophotography systems; if you have different astrophotography systems, no need to prepare dedicated filters, one SV240 can meet your needs due to its high compatibility;\u003c\/li\u003e\n\u003cli\u003ePhotoing more kinds of targets; SV240 multi-narrowband filter select Ha,OIII,H-Beta wavelength effectively can cover almost photoing needs;\u003c\/li\u003e\n\u003cli\u003eHigh transmittance; the \u0026gt;90% transmittance in core wavelength of Ha,OIII, H-Beta, more objects for your astrophotography by using this multi-bandpass filter;\u003c\/li\u003e\n\u003cli\u003eMulti-bandpass filters; without multiple filters' combination for colorful images; rich color in your lens;\u003c\/li\u003e\n\u003cli\u003eResistant of BORTLE 8; the multi-narrowband filters can be resistant from Bortle 1 to Bortle 8 cities, suitable for almost all urban;\u003c\/li\u003e\n\u003cli\u003e300-1100 mm working wavelength; the wider coverage of this multi-narrowband filter allows it to have a strong ability to tack light pollution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNote: \u003c\/span\u003e\u003c\/strong\u003eOptical filters that use infrared light often cause halos in the NIR region; which are exacerbated by the halos produced by the filter itself.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\" cellspacing=\"0\" cellpadding=\"0\" dir=\"ltr\" border=\"1\" style=\"table-layout: fixed; font-size: 10pt; font-family: Arial; width: 703px; border-collapse: collapse; border: medium;\" data-sheets-root=\"1\" data-sheets-baot=\"1\" height=\"527\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"100\" style=\"width: 266px;\"\u003e \u003ccol width=\"100\" style=\"width: 266px;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSVBONY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSV240\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eName\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003eMulti-Narrowband Filter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e2-inch or 1.25-inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eWavelength Range\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eFWHM\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e24nm \u0026amp; 20nm \u0026amp; 115nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eBlocking\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 701px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e\u0026gt;OD5@300-450nm；\u0026gt;OD4@560-620nm；\u0026gt;OD2\u0026gt;690-750nm； \u0026gt;OD3@940-1100nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 802px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003eT＞95%@486.1nm；T＞92%@495.9nm；T\u0026gt;85%@500.7nm；T\u0026gt;95%@656.3nm； Tavg\u0026gt;95%@830-870nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSurface Parallelism\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003e1\/4λ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eSingle Thread\u003c\/td\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 20px;\"\u003e\n\u003ctd style=\"overflow: hidden; padding: 0px 3px 0px 3px; vertical-align: bottom; font-size: 12pt;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"border-right: 1px solid transparent; overflow: visible; padding: 0px 0px 0px 0px; vertical-align: bottom; font-size: 12pt;\"\u003e\n\u003cdiv style=\"white-space: nowrap; overflow: hidden; position: relative; width: 196px; left: 3px;\"\u003e\n\u003cdiv style=\"float: left;\"\u003e12.5g \/ 0.44oz \/0.027lb\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSVBONY SV240 Multi-Narrowband Filter Galaxy \u0026amp; Nebula Near-infrared Light Pollution \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\"\u003eSVBony's Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25-inch","offer_id":47762725765349,"sku":"SVB-W9191B","price":144.0,"currency_code":"CAD","in_stock":true},{"title":"2-inch","offer_id":47762725798117,"sku":"SVB-W9191A","price":167.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_34ea8596-d083-409d-9149-3b5a569d10cd.jpg?v=1777043470"},{"product_id":"baader-sloan-sdss-filters-photometric","title":"Baader SLOAN\/SDSS Filters – Photometric (FSLN)","description":"\u003ch1\u003eBaader SLOAN\/SDSS Filters – Photometric\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBaader SLOAN-ugriz' Bandpass Filter Set, suitable from f\/15 to f\/1.8\u003c\/li\u003e\n\u003cli\u003eSLOAN\/SDSS (ugriz’) photometric filters with transmission according to SLOAN-specification\u003c\/li\u003e\n\u003cli\u003eManufactured with most advanced ion beam coating technology \/ Daylight-Proof\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim\u003c\/li\u003e\n\u003cli\u003eEqually suitable for modern CMOS cameras as well as for older CCD camera technologies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe new generation of Baader CMOS-optimized filters features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed read more)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"data-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eMANUFACTURER\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eCOLOUR\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTRANSMISSION RANGE\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003cspan\u003eTransmission according to SLOAN-Specification\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\n\u003cul\u003e\n\u003cli\u003e1.25\/2\/36\/47.4: 2mm Thick\u003c\/li\u003e\n\u003cli\u003e50.4\/50x50\/65x65: 3mm Thick\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eCWL (CENTRAL WAVELENGTH)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003cspan\u003eSLOAN\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eAR-COATING\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSPECIAL FEATURES\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eLife-Coat™\u003cspan\u003e \u003c\/span\u003eWarranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFILTER SIZE\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e1 25 inch, 2 inch, 36 mm, 50.4 mm, 50 x 50 mm, 65 x 65 mm, 100 x 100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFILTER USAGE\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e\u003cspan\u003eSLOAN, CMOS, CCD\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFILTER MOUNTED\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMounted (LPFC 6mm) \/ Unmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eTYPE OF FILTER\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eSINGLE OR SET?\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eSingle and Filterset\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"label\"\u003eFILTER SHAPE\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eround or square\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eBaader 2 year warranty : \u003ca href=\"https:\/\/alpineastro.com\/pages\/returns?srsltid=AfmBOoqAi7RLBqy8sZbq5vne4zdOLwAmKuaaiwr7Os5UK4_ns84HXekz\"\u003eReturns and Warranty Policies — Alpine Astronomical LLC\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLimited-Lifetime-Warranty for CMOS-optimized Baader filters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings.\u003c\/p\u003e\n\u003cp\u003eBaader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from mis-use, physical damage through improper handling, or improper cleaning.\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"u' \/ 1.25 inch","offer_id":46279352123621,"sku":"BAA-FSLN-1U (Baader #2961700U)","price":225.0,"currency_code":"CAD","in_stock":true},{"title":"u' \/ 2 inch","offer_id":46279352156389,"sku":"BAA-FSLN-2U (Baader #2961703U)","price":370.0,"currency_code":"CAD","in_stock":true},{"title":"u' \/ 36 mm","offer_id":46279352189157,"sku":"BAA-FSLN-RD36U (Baader #2961702U)","price":297.0,"currency_code":"CAD","in_stock":true},{"title":"u' \/ 50.4 mm","offer_id":46279352221925,"sku":"BAA-FSLN-RD50U (Baader #2961704U)","price":443.0,"currency_code":"CAD","in_stock":true},{"title":"u' \/ 50 x 50 mm","offer_id":46279352254693,"sku":"BAA-FSLN-SQ50U (Baader #2961705U)","price":516.0,"currency_code":"CAD","in_stock":true},{"title":"u' \/ 65 x 65 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L-Para 10nm Dual Narrowband Light Pollution Filter (L-PARA-2)","description":"\u003ch1 class=\"title\"\u003eOptolong L-Para 10nm Dual Narrowband Light Pollution Filter\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do we make a L-Para filter with a dual band of 10nm?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn Chinese culture, the number ten symbolizes perfection in every way. An idiom in Chinese, 'shi quan shi mei' epitomizes reaching the best and most ideal state. Therefore, we aspire for the L-Para filter to achieve this standard. Specifically, it operates in dual bands, each with a width of 10nm. The repetition of the number ten signifies double wishes for your photography experiences and clear skies always. \u003c\/p\u003e\n\u003cp\u003eDuring the research phase, L-Para is dedicated to optimizing halo performance and effectively blocking out light pollution emissions. Images captured by L- Para will exhibit a dark background and precise colors. Halos around bright stars are caused by a complex optical chain. While we can't say no halo, but we believe that L-Para offers a entirely new perspective. \u003c\/p\u003e\n\u003cp\u003eAdditionally, L-Para is compatible with both fast optics and normal optics, covering focal ratios from F2 and above. One filter is designed to work with all your telescopes. L-Para, bringing you greater efficiency.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e1.  Optolong L-Para(L-Parallels)\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eOptolong L-Para is a brand new dual narrowband 10nm light pollution filter. The FWHM of L-Para is 10nm for OIII (500.7nm) and H-Alpha (656.3nm) respectively. The transmittance of nebulae emission lines at are both greater than 85% in system with focal ratios of F2 and above. It effectively filters out mercury lamp, sodium lamp, and LED light pollution emission lines. At the same time, it has excellent contrast and anti-halo characteristics, allowing you to capture detailed and vivid nebula images. L-Para is suitable for both normal optical systems and fast optical systems, such as RASA and Hyperstar systems. Even when light is incident at an oblique angle, it can still maintain high transmission rates to provide you with a clear and precise shooting experience.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA dual narrowband filter suitable for all telescope systems, adaptable to fast optics (focal ratios of F2, F2.8, F3.2, F4) as well as various standard\/normal focal ratio telescopes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLight Pollution Resistance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEffectively cuts off emission lines from mercury lamps, sodium lamps, LEDs, and other light pollution sources, making it applicable to Bortle Scale1- 7 dark skies.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Transmission Rate:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIn systems with a focal ratio of F2 and above, the transmittance of nebula emission lines OIII and Ha exceed 85%, resulting in higher imaging efficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExcellent Contrast:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe high transmittance of nebula emission lines (OIII \u0026amp; Ha) combined with deep cut-off of light pollution bands significantly improves image contrast and detail richness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnti-Halo Characteristics:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe design has undergone several round of optimizations and many times of repeated testing ,resulting in a marked improvement in anti-halo performance, enhancing the capture of bright stars.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e2.Spectrum\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eAccording to the characteristics of the emission lines of celestial bodies and light pollution, as well as the characteristicas of the normal telescope and fast ratio imaging system, L-Para has been maintaining high transmittance at OIII and Ha while blocking light pollution emission lines.\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"592\" width=\"1034\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9b96104f725faacefa9ded926bfab8da.png?v=1736024501\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"498\" width=\"1025\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2700143340459da0e3aa3e900c9c60f4.png?v=1736024535\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"523\" width=\"1080\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ec92b95b51a57afdfb563adfcf710c88.png?v=1736024560\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e3. Coating Technology\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e·Multi-layers anti-reflection coating\u003c\/p\u003e\n\u003cp\u003e·Non-cementing optical substrate coating\u003c\/p\u003e\n\u003cp\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/p\u003e\n\u003cp\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications \u003c\/h3\u003e\n\u003cp\u003e2\"（M48×0.75） \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: silve box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":46422525214949,"sku":"OPT-L-PARA-2","price":361.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_97fac2b9-20cb-4b5b-bc95-eb4f7dc3cee3.png?v=1777045161"},{"product_id":"askar-colour-magic-ultra-e1-e2-duo-narrowband-filter","title":"Askar Colour Magic Ultra E1 \u0026 E2 Duo Narrowband Filter","description":"\u003ch1\u003eAskar Colour Magic Ultra E1 \u0026amp; E2 Duo Narrowband Filter\u003c\/h1\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eAskar newly launched ColourMagic Ultra E1 2” Duo-narrowband Filter, is a professional astrophotography tool specifically designed for deep-sky imaging. The Ultra E1 filter, as the name suggests, has the \"Ultra\" halo control capability. During the filter research and development process, we made a special design optimization for Ultra E1. And in the end, it becomes a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title response-transition\"\u003eColourMagic Ultra E 2\" Duo-narrowband filter, is a professional astrophotography tool specifically designed for deep-sky imaging. Except for the traditional Hα+OⅢ Duo-narrowband filter, we innovatively introduced another filter--SⅡ+OⅢ. The ColourMagic Ultra E2 filter is a SII+OIII filter.\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6402603c-690d-4fa4-a926-7cf4f529e1d3_1024x1024.jpg?v=1749844738\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell response-transition\"\u003e\n\u003cdiv class=\"ie_fimg\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ie_line\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003eAskar Ultra E1 duo-band filter has an extremely narrow bandwidth, and an ultra-high transmittance over 85% at its center wavelength (500.7nm and 656.6nm). It can effectively eliminate the influence of light pollution. Even if you are in an area seriously affected by light pollution, the pictures taken with the ColourMagic Ultra E 2” Duo-narrowband Filter are still very good.  It is so practical and efficient that you can get astronomical images of high quality with just one duo-band filter and an ordinary astronomical colour camera.\u003c\/p\u003e\n\u003cp\u003eThe ColourMagic Ultra E 2” Duo-narrowband Filter is ideal for photographing emission nebulae, planetary nebulae or supernova remnants. The highly narrow bandwidth of the filter effectively blocks out the effects of light pollution or other distracting factors such as night glow.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9d0fe05c-f55f-4195-bca5-a696f3b16b83.jpg?v=1749844804\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Ultra E filter, as the name suggests, has the \"Ultra\" halo control capability. During the filter research and development process, we made a special design optimization for Ultra E. And in the end, it became a special filter with one bandwidth at 3nm and the other bandwidth outside 3nm.\u003c\/p\u003e\n\u003cp\u003eWhen shooting deep-sky galaxies with colour cameras, a duo-narrowband filter in the Hα and OⅢ bands is often used; whereas with a mono camera, a narrowband filter in the Hα, SⅡ and OⅢ bands is often used, leaving users with colour cameras missing one band of nebula detail. This can be compensated by using ColourMagic Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) mentioned above.\u003c\/p\u003e\n\u003cp\u003eColourMagic Ultra E2 Duo-narrowband filter (OⅢ+SⅡ) has an ultra-high transmittance of over 85% at its center wavelength (500.7nm and 672nm). It can effectively enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot. In areas with very serious light pollution, this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eColour Magic Ultra E1 OIII \u0026amp; Hα\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eE1 General information table\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e HA:3.7nm±0.3nm\/OIII：4.0±0.3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e500.7nm \u0026amp; 656.6nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e85%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e1.85 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e≥OD5 @ 200-1100nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e30″\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eE1 Parameter Diagram\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/a6711c5e-d7ec-4aa7-85b6-01a3f41b0290_1024x1024.jpg?v=1749845010\"\u003e\u003c\/div\u003e\n\u003ch2\u003eColour Magic Ultra E2 SII \u0026amp; OIII\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eE2 General information table\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e SII:4.0±0.3nm\/OIII：3.7nm±0.3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e500.7nm \u0026amp; 672nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e85%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e1.85 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e≥OD5 @ 200-1100nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e60\/40\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eParallelism\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e30″\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eE2 Parameter Diagram\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/e06bbb0c-04fd-46d7-b77e-af95b2131ba6_1024x1024.jpg?v=1749845112\"\u003e\u003c\/div\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eE1 OIII \u0026amp; Hα 2'' Filter \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eor\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eE2  SII \u0026amp; OIII 2'' Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eor \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eE1 + E2 2'' Filter Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cp\u003eAskar Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Colour Magic E1 (OIII \u0026 Hα)","offer_id":46842191380709,"sku":"ASK-CM-E1","price":859.0,"currency_code":"CAD","in_stock":true},{"title":"Colour Magic E2 (SII \u0026 OIII)","offer_id":46842191413477,"sku":"ASK-CM-E2","price":859.0,"currency_code":"CAD","in_stock":true},{"title":"Colour Magic E1 + E2 Filter Package","offer_id":46842191446245,"sku":"ASK-CM-E1+E2","price":1679.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/E1_E2.webp?v=1749845786"},{"product_id":"svbony-narrowband-filter-3nm-h-alpha-oiii-sv220-w9198","title":"SVBony SV220 3nm Narrowband Filter Ha \u0026 OIII","description":"\u003ch1\u003eNarrowband Filter 3nm H-Alpha \u0026amp; Oiii SV220\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-narrow 3nm (H-Alpha \u0026amp; OIII) bandwidth, ideal for photographing emission and planetary nebulae;\u003c\/li\u003e\n\u003cli\u003eMinimal halo coating design, effectively blocking excess light and reducing halos;\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePerfectly compatible with full-frame telescopes and cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b_20250828175857_7509.jpg?v=1757778172\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eMinimal Halo Coating Design\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis narrowband filter Adopts multi-layer minimal halo coating technology, it reduces glare and halo interference. It thereby enhances image contrast and color accuracy, presents sharp celestial details against a clean background, and improves the purity of deep-sky photography images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b-1_20250828175909_6166.jpg?v=1757778197\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9198b-3_20250828175937_5948.jpg?v=1757778242\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable style=\"width: 100.079%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 40.2255%;\"\u003e\u003cstrong\u003e2-inch Version\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"width: 32.5635%;\"\u003e\u003cstrong\u003e1.25-inch Version\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBandwidth \/ FWHM (H‑α \u0026amp; OIII)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e~3 nm (ultra‑narrow)\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e~3 nm ±1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eThread Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eM48 × 0.75\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eM28.5 × 0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBarrel \/ Filter Cell Outside Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eØ50.8 × 7 mm\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eØ31.75 × 7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eOptical Cut‑off \/ Transmission Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e300 nm – 1050 nm\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e300 nm – 1050 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eBlocking \/ Out‑of‑Band Suppression\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eAverage OD5 (0.001 %)\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eAverage OD5 (0.001 %)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003ePeak Transmission at Target Lines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003e≥85 % at H‑α \u0026amp; OIII\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003e≥85 % at H‑α \u0026amp; OIII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eCoating \/ Halo Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eMulti-layer, anti-reflection, minimal halo design\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eMulti-layer, anti-reflection, minimal halo design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.5775%;\"\u003e\u003cstrong\u003eDesign Notes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 40.2255%;\"\u003eSuitable for full-frame sensors; minimal vignetting; optimized for light pollution control and enhanced nebula contrast\u003c\/td\u003e\n\u003ctd style=\"width: 32.5635%;\"\u003eSame features apply; best performance with slower focal ratios (not ultra-fast optics)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"171\" data-end=\"303\"\u003e\n\u003cp data-start=\"173\" data-end=\"303\"\u003e\u003cstrong data-start=\"173\" data-end=\"226\"\u003eSVBONY SV220 3 nm Dual-Band H‑Alpha \u0026amp; OIII Filter\u003c\/strong\u003e\u003cbr data-start=\"226\" data-end=\"229\"\u003e– Available in either \u003cstrong data-start=\"253\" data-end=\"269\"\u003e2-inch (M48)\u003c\/strong\u003e or \u003cstrong data-start=\"273\" data-end=\"294\"\u003e1.25-inch (M28.5)\u003c\/strong\u003e format\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"304\" data-end=\"402\"\u003e\n\u003cp data-start=\"306\" data-end=\"402\"\u003e\u003cstrong data-start=\"306\" data-end=\"341\"\u003eProtective Plastic Storage Case\u003c\/strong\u003e\u003cbr data-start=\"341\" data-end=\"344\"\u003e– Foam-lined interior for secure storage and transport\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"403\" data-end=\"499\"\u003e\n\u003cp data-start=\"405\" data-end=\"499\"\u003e\u003cstrong data-start=\"405\" data-end=\"434\"\u003eMicrofiber Cleaning Cloth\u003c\/strong\u003e\u003cbr data-start=\"434\" data-end=\"437\"\u003e– For safe and scratch-free cleaning of the filter surface\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"500\" data-end=\"600\"\u003e\n\u003cp data-start=\"502\" data-end=\"600\"\u003e\u003cstrong data-start=\"502\" data-end=\"543\"\u003eUser Information Card or Basic Manual\u003c\/strong\u003e\u003cbr data-start=\"543\" data-end=\"546\"\u003e– Filter handling tips and specifications overview\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Svbony","offers":[{"title":"1.25\"","offer_id":47669861810405,"sku":"SVB-W9198A","price":167.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":47669861843173,"sku":"SVB-W9198B","price":347.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_8994f89f-3f71-4f1b-8045-ce116ed41fe3.jpg?v=1777043747"},{"product_id":"optolong-l1-l-quad-l-para-enhence-filter-set-l1","title":"Optolong L1 L-Quad \u0026 L-Para Enhence Filter Set (L1-SET)","description":"\u003ch1\u003eOptolong L1 L-Quad \u0026amp; L-Para Enhence Filter Set\u003c\/h1\u003e\n\u003cp\u003eL1 Dual -Combo Set includes：one L-Quad Enhance Filter and one L-Para L-Quad Enhance Filter：Quad bandpass broadband filter , This filter provides better color balance while improving resistance of light pollution. It is suitable for a wide range of imaging targets, including continuous spectrum objects (RGB) such as nebulae, galaxies, and star clusters. This filter maximizes the preservation of RGB color balance in broadband spectrum targets like nebulae and galaxies, effectively improving con \u003c\/p\u003e\n\u003ch2\u003e\u003ca rel=\"noopener\" href=\"https:\/\/istronomyplus.com\/products\/optolong-l-enhance-filter?_pos=4\u0026amp;_sid=08b680de8\u0026amp;_ss=r\" target=\"_blank\"\u003eL-Quad Enhance Filter\u003c\/a\u003e\u003c\/h2\u003e\n\u003cp\u003eQuad bandpass broadband filter ,  This filter provides better color balance while improving resistance of light pollution. It is suitable for a wide range of imaging targets, including continuous spectrum objects (RGB) such as nebulae, galaxies, and star clusters. This filter maximizes the preservation of RGB color balance in broadband spectrum targets like nebulae and galaxies, effectively improving contrast and detail to render subjects more vivid and three-dimensional.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_1024x1024.jpg?v=1758301649\"\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003ca href=\"https:\/\/istronomyplus.com\/products\/optolong-l-para-10nm-dual-narrowband-light-pollution-filter-lpar-200?_pos=2\u0026amp;_sid=08b680de8\u0026amp;_ss=r\" rel=\"noopener\" target=\"_blank\"\u003eL-Para\u003c\/a\u003e\u003c\/h2\u003e\n\u003cp\u003eA dual narrowband 10nm filter  ,in systems with a focal ratio of F2 and above, the transmittance of nebula emission lines OIII and Ha exceed 85%, with excellent contrast and Anti-Halo characteristics . This filter suitable for all telescope systems, adaptable to fast optics (focal ratios of F2, F2.8, F3.2, F4) as well as various standard\/normal focal ratio telescopes. Ideal for capturing Hα \u0026amp; OIII signals in celestial objects, this filter enhances image contrast and reveals richer details in Hα \u0026amp; OIII emissions.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9b96104f725faacefa9ded926bfab8da_70c51161-6868-41ef-89ce-6603d4232bf9_1024x1024.png?v=1758301713\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2700143340459da0e3aa3e900c9c60f4_d78ac1cf-a484-4232-ab8c-af8e272a4efa_1024x1024.png?v=1758301754\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ec92b95b51a57afdfb563adfcf710c88_5fb714e0-720c-485c-a1cc-0fc1cb431ece_1024x1024.png?v=1758301769\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003e1+1\u0026gt;2 features\u003c\/h2\u003e\n\u003cp\u003e“Broadband + Narrowband” synergy engineered for precision and colour fidelity,achieves precise signal capture and color optimization for astrophotography\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eL-Quad Enhance Filter:\u003c\/strong\u003e\u003c\/span\u003e Quad bandpass broadband filter captures the RGB signals of celestial targets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eL-Para :\u003c\/strong\u003e\u003c\/span\u003e Dual narrowband 10nm filter selectively acquires Hα and OIII emission lines, revealing fine filamentary structures and the detailed morphology of ionised gas in deep-sky objects. After post-processing,photographers can effortlessly obtain fused images combining RGB with Hα \u0026amp; OIII data. This \"Broadband-Narrowband Synergy\" solution delivers more vibrant color rendition while accentuating subtle signal details, unlocking innovative approaches for astrophotography and enhancing the creative possibilities of color camera imaging. It pioneers new artistic dimensions, transforming the deep-sky photography process into a more technically engaging and visually rewarding experience.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCoating Technology\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ch2\u003eL-Quad Enhance 2\"\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eB270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission (Tpeak)\u003c\/td\u003e\n\u003ctd\u003eT \u0026gt; 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Range\u003c\/td\u003e\n\u003ctd\u003e300 – 1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking Depth\u003c\/td\u003e\n\u003ctd\u003eLight pollution line blocking \u0026gt; 99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront (RMS)\u003c\/td\u003e\n\u003ctd\u003eλ\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallelism\u003c\/td\u003e\n\u003ctd\u003e30″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/dbeae9d38c40e5c4742bd4ce3bc3eddf_1024x1024.jpg?v=1758301649\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eL-Para 2\"\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eInfo\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBroad Compatibility\u003c\/td\u003e\n\u003ctd\u003eWorks with all telescope systems, including fast optics (F2–F4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Pollution Resistance\u003c\/td\u003e\n\u003ctd\u003eBlocks mercury, sodium, LED lines; effective under Bortle 1–7 skies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Transmission Rate\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;85% for OIII \u0026amp; Hα (at F2 and above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExcellent Contrast\u003c\/td\u003e\n\u003ctd\u003eHigh nebula transmission + strong light pollution cut-off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Halo Characteristics\u003c\/td\u003e\n\u003ctd\u003eOptimized design, tested for improved anti-halo on bright stars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9b96104f725faacefa9ded926bfab8da_70c51161-6868-41ef-89ce-6603d4232bf9_1024x1024.png?v=1758301713\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2700143340459da0e3aa3e900c9c60f4_d78ac1cf-a484-4232-ab8c-af8e272a4efa_1024x1024.png?v=1758301754\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/ec92b95b51a57afdfb563adfcf710c88_5fb714e0-720c-485c-a1cc-0fc1cb431ece_1024x1024.png?v=1758301769\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/p\u003e\n\u003cp\u003e▲The vertical axis is transmission in %.\u003c\/p\u003e\n\u003ctable style=\"width: 100.044%; height: 78.4px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003cth style=\"width: 40.0348%; height: 39.2px;\"\u003eThe Major Emission Lines of Nebulae\u003c\/th\u003e\n\u003cth style=\"width: 56.8783%; height: 39.2px;\"\u003eThe Major Emission Lines of Artificial Light Pollution\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 40.0348%; height: 19.6px;\"\u003eH-α 656.3 nm  H-β 486.1 nm\u003c\/td\u003e\n\u003ctd style=\"width: 56.8783%; height: 19.6px;\"\u003eHg 435.8 nm  546.1 nm  577 nm  578.1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 40.0348%; height: 19.6px;\"\u003eOIII 495.9 nm  OIII 500.7 nm\u003c\/td\u003e\n\u003ctd style=\"width: 56.8783%; height: 19.6px;\"\u003eNa 598 nm  589.6 nm  615.4 nm  616.1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eL-Quad Enhence Filter - 2\"\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14px;\"\u003e\u003cspan style=\"font-family: Arial,Helvetica,sans-serif;\"\u003eL-Para Filter - 2\"\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong Warranty\u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":47759264579813,"sku":"OPT-L1-SET","price":557.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Optolong-L1-Dual-Combo-Set_1200x1200_9dc91923-6a0e-4cd2-ae46-30fb0d90f7fb.webp?v=1758302755"},{"product_id":"svbony-sv260-multi-bandpass-filter-w9194a","title":"SVBONY SV260 Multi-Bandpass Filter (W9194A)","description":"\u003ch1\u003eSVBONY SV260 Multi-Bandpass Filter\u003c\/h1\u003e\n\u003cp data-start=\"18\" data-end=\"462\"\u003eSV260 multi‑broadband filter is a 5‑bandpass light pollution filter for deep‑sky photography, galaxies, reflection nebulae, starfields and more Single‑thread 2‑inch format with M48×0.75 mounting Substrate thickness 2 mm Clear aperture 44 mm Wavelength range 300‑1000 nm Peak transmittance ≈ 90% Blocks many common light pollution and emission lines OD4 cut‑off in UV and IR regions Also strong blocking at Hg, Na and in the near infrared region\u003c\/p\u003e\n\u003ch3 data-start=\"464\" data-end=\"494\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"_tableContainer_1rjym_1\"\u003e\n\u003cdiv class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\"\u003e\n\u003ctable data-start=\"495\" data-end=\"987\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"495\" data-end=\"521\"\u003e\n\u003ctr data-start=\"495\" data-end=\"521\"\u003e\n\u003cth data-start=\"495\" data-end=\"511\" data-col-size=\"sm\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"511\" data-end=\"521\" data-col-size=\"lg\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"532\" data-end=\"987\"\u003e\n\u003ctr data-start=\"532\" data-end=\"556\"\u003e\n\u003ctd data-start=\"532\" data-end=\"546\" data-col-size=\"sm\"\u003eFilter Size\u003c\/td\u003e\n\u003ctd data-start=\"546\" data-end=\"556\" data-col-size=\"lg\"\u003e2‑inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"557\" data-end=\"587\"\u003e\n\u003ctd data-start=\"557\" data-end=\"579\" data-col-size=\"sm\"\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd data-start=\"579\" data-end=\"587\" data-col-size=\"lg\"\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"588\" data-end=\"614\"\u003e\n\u003ctd data-start=\"588\" data-end=\"605\" data-col-size=\"sm\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd data-start=\"605\" data-end=\"614\" data-col-size=\"lg\"\u003e44 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"615\" data-end=\"649\"\u003e\n\u003ctd data-start=\"615\" data-end=\"634\" data-col-size=\"sm\"\u003eWavelength Range\u003c\/td\u003e\n\u003ctd data-start=\"634\" data-end=\"649\" data-col-size=\"lg\"\u003e300‑1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"650\" data-end=\"680\"\u003e\n\u003ctd data-start=\"650\" data-end=\"671\" data-col-size=\"sm\"\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd data-start=\"671\" data-end=\"680\" data-col-size=\"lg\"\u003e~ 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"681\" data-end=\"863\"\u003e\n\u003ctd data-start=\"681\" data-end=\"710\" data-col-size=\"sm\"\u003eOD Blocking Specifications\u003c\/td\u003e\n\u003ctd data-start=\"710\" data-end=\"863\" data-col-size=\"lg\"\u003e\u0026gt;OD4 @ 350‑400 nm • \u0026gt;OD2 @ Hg 589 nm, 435.8 nm • \u0026gt;OD2 @ Na 589.6 nm • \u0026gt;OD1 @ Hg 546.1 nm • \u0026gt;OD2 @ Na 615.4 nm • \u0026gt;OD3 @ Hg 577 nm • \u0026gt;OD4 @ 720‑1100 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"864\" data-end=\"891\"\u003e\n\u003ctd data-start=\"864\" data-end=\"882\" data-col-size=\"sm\"\u003eSurface Quality\u003c\/td\u003e\n\u003ctd data-start=\"882\" data-end=\"891\" data-col-size=\"lg\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"892\" data-end=\"923\"\u003e\n\u003ctd data-start=\"892\" data-end=\"914\" data-col-size=\"sm\"\u003eSurface Parallelism\u003c\/td\u003e\n\u003ctd data-start=\"914\" data-end=\"923\" data-col-size=\"lg\"\u003e1\/2 λ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"924\" data-end=\"961\"\u003e\n\u003ctd data-start=\"924\" data-end=\"933\" data-col-size=\"sm\"\u003eThread\u003c\/td\u003e\n\u003ctd data-start=\"933\" data-end=\"961\" data-col-size=\"lg\"\u003eM48 × 0.75 single thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"962\" data-end=\"987\"\u003e\n\u003ctd data-start=\"962\" data-end=\"975\" data-col-size=\"sm\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd data-start=\"975\" data-end=\"987\" data-col-size=\"lg\"\u003e~ 12.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-start=\"989\" data-end=\"1005\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-start=\"1006\" data-end=\"1045\"\u003e\n\u003cli data-start=\"1006\" data-end=\"1045\"\u003e\n\u003cp data-start=\"1008\" data-end=\"1045\"\u003eSV260 Multi‑broadband filter (2‑inch)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" rel=\"noopener\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":47762874106085,"sku":"SVB-W9194A","price":174.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/w9194a-1_20250908104958_7694.jpg?v=1777043755"},{"product_id":"optolong-dual-narrow-band-filter","title":"Optolong 2\" L-Synergy 7nm Dual NarrowBand Filter (L-SYNERGY)","description":"\u003ch1\u003eOptolong 2\" L-Synergy 7nm Dual NarrowBand Filter (SII and OIII) \u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Synergy is a dual 7nm narrowband filter compatible with DSLR cameras, color CMOS sensors, and CCD cameras, supporting telescope systems with F-ratio of F3.3 or above (slower system）. Its key advantage lies in enabling astrophotography amateurs to capture exceptionally detailed emission nebulae even in light-polluted environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAfter years of technical refinement, it has been optimized to minimize bright star halos while isolating all emission lines except SII and OIII, achieving maximum effective transmission.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOptolong L-Synergy's advantage lies in its selective transmission of only the nebula emission lines OIII (500.7nm) and SII (672.4nm), while blocking all other light-polluting emission lines. This ensures that only the signals from oxygen and sulfur elements are captured during imaging, resulting in a darker sky background and significantly enhanced contrast and signal-to-noise ratio (SNR) between nebulae.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEven in heavily light-polluted areas, this filter selectively transmits nebula emission lines while filtering out light pollution, ultimately eliminating its impact on astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBy analyzing the spectral characteristics of both celestial emission lines and light pollution, L-Synergy selectively preserves the SII and OIII nebula colors while filtering out the majority of light pollution. Specifically designed and optically optimized, L-Synergy maintains consistently high transmission across both SII and OIII bands. This ensures users can precisely capture the target nebula emissions, delivering optimal astrophotography results.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_6c99d215-26fa-4dec-97c7-8587f8169a0d.png?v=1759336984\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHow to read the chart?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The horizontal axis is the Wavelength in Nanometers(nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e▲The vertical axis is transmission in %.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_260beffd-fac7-43c0-bb8f-39371fce8576.jpg?v=1759337078\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eCoating Technology\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Multi-layers anti-reflection coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Non-cementing optical substrate coating\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Optolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e·Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3_96f41837-73c5-433f-bd12-d0b744ffe11b.jpg?v=1759337244\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eL-Synergy Filter Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eI. WR134 in the Cygnus constellation © Gianni Lacroce\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTest with the new Optolong L-sinergy filter, a 7nm S2 O3 dual-band filter, and \u003cu\u003eI have to say I really liked it.\u003c\/u\u003e\u003cbr\u003eI chose to photograph WR134 in the constellation Cygnus.\u003cbr\u003eHaving shot in monochrome, which usually results in a significant amount of signal with an H-alpha filter, the O3 is there, but sometimes I have to integrate a lot to bring it out; the S2 isn't there at all. So I thought, ‘There won't be all that much signal; to take a decent photo, I'll have to integrate a lot,’ and that's why I took 200 5-minute shots.\u003cbr\u003eOnce I'd processed the photo, I found it came out of the WBPP \u003cu\u003ewithout gradients or halos\u003c\/u\u003e, but above all, bicolour, meaning full of S2 and lots and lots of O3, and I find this wonderful. I didn't have to do anything else in processing except stretch the image, balance contrast, highlights, and tones to customise it a bit, but in the end, it was already like this in the raw file.\u003cbr\u003e\u003cu\u003eThis filter greatly simplifies post-production.\u003c\/u\u003e\u003cbr\u003eI'll also show you the Starless Nebula to help you understand the signal and the O3 it produces.\u003cbr\u003eMore shots of this new filter will follow soon.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eEQUIPMENT\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eImaging Telescope: Newton Tecnosky Carbon 200\u003cbr\u003eImaing CameraZwo Asi 2600 duo  \u003cbr\u003eMount: Zwo Am5\u003cbr\u003eOptolong \u003cu\u003e\u003cstrong\u003eL-Synergy\u003c\/strong\u003e\u003c\/u\u003e filters\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003ePHOTOS\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003etemp 0 with dark, flat and darkflat\u003cbr\u003e200 x 300s  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePROCESSING\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePixinsight\u003cbr\u003ePhotoshop\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_152b9ecb-fc58-47ca-a2fb-7e7df52da8a3.jpg?v=1759337273\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/5_4c31f387-a3f9-431b-858c-0e46f3b60fd1.jpg?v=1759337308\"\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications \u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e2\"（M48×0.75）\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: start;\"\u003eIn the box\u003c\/h3\u003e\n\u003cp\u003eOptolong L-Synergy dual-narrow band filter (SII and OIII)\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eOptolong Warranty\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":47797222342885,"sku":"OPT-L-SYNERGY","price":431.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S1_b7cee943-c691-408d-b79e-b5b5febe8a96.jpg?v=1777043771"},{"product_id":"svbony-sv220-narrowband-filter-7nm-sii-oiii-for-astrophotography-1-25inch-w9172c","title":"Svbony SV220 7nm Dual-Band Nebula Filter SII \u0026 OIII (1.25” \/ 2”)","description":"\u003ch1\u003e\n\u003cmeta charset=\"utf-8\"\u003eSvbony SV220 7nm Dual-Band Nebula Filter SII \u0026amp; OIII\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eThe SV220 SII \u0026amp; OIII  7nm is a Duo Band Filter. It is designed to be used in combination with the SV220 H-Alpha \u0026amp; OIII Duo Band Filter to provide a superior method for achieving the SHO (Hubble Pallet) narrow band colour balance with colour imaging cameras. The SII and OIII Filter provides the missing band data so that owners of colour cameras can achieve the SHO colour balance in their narrow band images. The Duo-band filter (SII+OIII) has a high transmission of over 85% at its center wavelength (500.7nm and 672nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing contrast throughout the image and enhancing the contrast of your pictures, thus making it easier to display the details of the stars. In areas with very serious light pollution, this filter can also selectively filter light pollution.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e\u003cstrong\u003e1.25inch SII+OIII Dual-Band Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_3ff89093-9901-4d8d-94a0-b491a9932cb2.webp?v=1763152174\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_73570da8-e555-41d0-9492-0764546b59c5.webp?v=1763152186\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3_9ca6757d-620b-4857-bdfe-235b1704f981.webp?v=1763152200\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_88f8d051-aea1-4273-8785-5a3f8b09a509.webp?v=1763152214\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/5_c1d5f6c8-a2a9-4f2a-90f6-0f1c67d21f82.webp?v=1763152227\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6_1f2fdcfc-13f3-4e4a-8cb9-64fb346590f2.webp?v=1763152244\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/7_b5151030-b2c3-489d-80e5-824edcc1c795.webp?v=1763152260\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/8_46a0929a-bf5a-48d3-93d0-f556b0b7cda2.webp?v=1763152271\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9_a104fbca-983e-40b4-9d7f-8007988e4913.webp?v=1763152280\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/10_59521ee9-b87a-4be8-a95e-8a0de620e0cf.webp?v=1763152296\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e\u003cstrong\u003e2 inch SII+OIII Dual-Band Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/1_45e60788-8bad-45e3-910d-98c761936df9.webp?v=1763155185\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/2_c652fea8-bd26-4f54-9d9f-54ea4bab0dfb.webp?v=1763155256\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/3_65bcf700-84c2-4491-9f4f-60c7c7965577.webp?v=1763155265\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_27318d54-d87e-40cd-8e3b-7f118d9f2dd1.webp?v=1763155275\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/5_02887b4e-53aa-4a96-83c4-0e058aedd49f.webp?v=1763155287\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6_efa1126b-e233-44bc-be58-b2b4d3170bed.webp?v=1763155300\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/9_c9c52fec-b568-4591-8fe8-6d4e659d0ed4.webp?v=1763155325\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003e2-Inch Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003e1.25-Inch Specification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSV220\u003c\/td\u003e\n\u003ctd\u003eSV220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003eSII \u0026amp; OIII Duo-Band OSC Filter\u003c\/td\u003e\n\u003ctd\u003eSII \u0026amp; OIII Duo-Band OSC Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e2-Inch\u003c\/td\u003e\n\u003ctd\u003e1.25-Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e1.85 mm\u003c\/td\u003e\n\u003ctd\u003e1.80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture\u003c\/td\u003e\n\u003ctd\u003e44 mm\u003c\/td\u003e\n\u003ctd\u003e26 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e300–1000 nm\u003c\/td\u003e\n\u003ctd\u003e300–1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e7 nm\u003c\/td\u003e\n\u003ctd\u003e7 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking\u003c\/td\u003e\n\u003ctd\u003e≥OD5\u003c\/td\u003e\n\u003ctd\u003e≥OD5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmittance\u003c\/td\u003e\n\u003ctd\u003e≥88%\u003c\/td\u003e\n\u003ctd\u003e≥88%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003ctd\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Parallelism\u003c\/td\u003e\n\u003ctd\u003e1\/2λ\u003c\/td\u003e\n\u003ctd\u003e1\/2λ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003ctd\u003eM28.5x0.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle Thread\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e15–20 g\u003c\/td\u003e\n\u003ctd\u003e7 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eSVBONY SV220 Narrowband Filter\u003c\/p\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"7nm SII \u0026 OIII 1.25”","offer_id":48085246902501,"sku":"SVB-W9172C","price":138.0,"currency_code":"CAD","in_stock":true},{"title":"7nm SII \u0026 OIII 2”","offer_id":48085246935269,"sku":"SVB-W9172D","price":235.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/S2_3a4bf24d-4265-46ee-92e1-d2485c66a9dd.webp?v=1763153429"},{"product_id":"qhy-minicam8-filter-sets","title":"QHY Minicam8 Filter Sets","description":"\u003ch1\u003eQHY Minicam8 Filter Sets\u003c\/h1\u003e\n\u003cp data-end=\"205\" data-start=\"0\"\u003eThe miniCAM8 IMX585 filter kits are purpose-built all-in-one solutions designed for seamless integration with the camera’s internal filter wheel, ensuring fast installation and precise optical alignment. Each kit includes pre-mounted, high-quality optical filters with advanced multi-layer coatings that maximize light transmission while maintaining strong rejection of unwanted wavelengths.\u003c\/p\u003e\n\u003cp data-end=\"589\" data-start=\"398\"\u003eOptimized specifically for the Sony IMX585 sensor, these filters enhance sensitivity, reduce noise, and preserve accurate color balance across a wide range of astrophotography applications. Broadband LRGB filter sets enable true-color imaging with sharp detail and natural tonal reproduction for galaxies, star clusters, and other deep-sky objects.\u003c\/p\u003e\n\u003cp data-end=\"930\" data-start=\"753\"\u003eNarrowband filter options, including H-alpha, OIII, and SII in 3nm or 7nm bandpasses, isolate key emission lines to dramatically improve contrast and detail in nebula imaging. Integrated UV\/IR-cut and multi-band filters help control unwanted spectral interference and improve performance under light-polluted or urban skies. Specialized planetary filters, such as methane, ultraviolet, and sodium, allow for detailed atmospheric and surface feature capture on planets.\u003c\/p\u003e\n\u003cp data-end=\"1364\" data-start=\"1231\"\u003ePhotometric Sloan filter kits provide scientifically calibrated passbands for accurate measurement, research, and data consistency. High optical density coatings (OD5) effectively suppress stray light and reduce halos, delivering cleaner images with improved signal-to-noise ratio.\u003c\/p\u003e\n\u003cp data-end=\"1699\" data-start=\"1519\"\u003eThe compact, low-profile filter disc design maintains balance and efficiency within the miniCAM8 system while simplifying workflow and reducing the need for external accessories. These all-in-one filter kits provide a versatile, professional-grade solution for deep-sky imaging, planetary observation, and scientific astrophotography in a single streamlined package.\u003c\/p\u003e\n\u003cp data-end=\"1699\" data-start=\"1519\"\u003e \u003c\/p\u003e\n\u003ch3 data-end=\"1699\" data-start=\"1519\"\u003eTechnical specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eminiCAM8 IMX585 with integrated filter wheel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Format\u003c\/td\u003e\n\u003ctd\u003ePre-mounted filters on dedicated internal filter disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eDrop-in design with included mounting hardware\/tools\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coating\u003c\/td\u003e\n\u003ctd\u003eMulti-layer anti-reflection coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Density\u003c\/td\u003e\n\u003ctd\u003eOD5 (high stray light suppression)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Efficiency\u003c\/td\u003e\n\u003ctd\u003eHigh transmission across designed passbands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Optimization\u003c\/td\u003e\n\u003ctd\u003eTuned for Sony IMX585 spectral response\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBroadband Filters\u003c\/td\u003e\n\u003ctd\u003eLRGB (Luminance, Red, Green, Blue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarrowband Filters\u003c\/td\u003e\n\u003ctd\u003eH-alpha, OIII, SII\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNarrowband Bandpass Options\u003c\/td\u003e\n\u003ctd\u003e3nm or 7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Pollution Control\u003c\/td\u003e\n\u003ctd\u003eMulti-band and selective wavelength rejection filters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV\/IR Control\u003c\/td\u003e\n\u003ctd\u003eIntegrated UV\/IR-cut options available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlanetary Filters\u003c\/td\u003e\n\u003ctd\u003eMethane (CH4), UV, Sodium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhotometric Filters\u003c\/td\u003e\n\u003ctd\u003eSloan (scientific calibration set)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor Accuracy\u003c\/td\u003e\n\u003ctd\u003eBalanced spectral response for true-color imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHalo Control\u003c\/td\u003e\n\u003ctd\u003eReduced internal reflections and minimal halo artifacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContrast Enhancement\u003c\/td\u003e\n\u003ctd\u003eImproved signal-to-noise ratio for faint objects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication Types\u003c\/td\u003e\n\u003ctd\u003eDeep-sky, planetary, photometric, urban imaging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Design\u003c\/td\u003e\n\u003ctd\u003eCompact, low-profile filter disc system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkflow Efficiency\u003c\/td\u003e\n\u003ctd\u003eNo external filter wheel required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Integration\u003c\/td\u003e\n\u003ctd\u003eFully aligned with internal optical path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse Case Versatility\u003c\/td\u003e\n\u003ctd\u003eImaging + scientific measurement in one system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003cstrong data-end=\"60\" data-start=\"39\"\u003e\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cp data-end=\"472\" data-start=\"441\"\u003e\u003cstrong data-end=\"472\" data-start=\"441\"\u003eLRGB + Narrowband Combo Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"646\" data-start=\"473\"\u003e\n\u003cli data-end=\"538\" data-start=\"473\" data-section-id=\"1w08ich\"\u003eCombined LRGB + H-alpha, OIII, SII filters on integrated disc\u003c\/li\u003e\n\u003cli data-end=\"607\" data-start=\"539\" data-section-id=\"123ihml\"\u003eMulti-purpose configuration for broadband and narrowband imaging\u003c\/li\u003e\n\u003cli data-end=\"646\" data-start=\"608\" data-section-id=\"1ad2qmz\"\u003eInstallation hardware and tool set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"873\" data-start=\"849\"\u003e\u003cstrong data-end=\"873\" data-start=\"849\"\u003ePlanetary Filter Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1040\" data-start=\"874\"\u003e\n\u003cli data-end=\"935\" data-start=\"874\" data-section-id=\"13jae74\"\u003eMethane (CH4), UV, and Sodium filters pre-mounted on disc\u003c\/li\u003e\n\u003cli data-end=\"1001\" data-start=\"936\" data-section-id=\"p609ph\"\u003eOptimized for planetary atmosphere and surface detail imaging\u003c\/li\u003e\n\u003cli data-end=\"1040\" data-start=\"1002\" data-section-id=\"1ad2qmz\"\u003eInstallation hardware and tool set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1069\" data-start=\"1042\"\u003e\u003cstrong data-end=\"1069\" data-start=\"1042\"\u003ePhotometric (Sloan) Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1239\" data-start=\"1070\"\u003e\n\u003cli data-end=\"1135\" data-start=\"1070\" data-section-id=\"14dd3p\"\u003eSloan filter set (e.g., g’, r’, i’, etc.) pre-mounted on disc\u003c\/li\u003e\n\u003cli data-end=\"1200\" data-start=\"1136\" data-section-id=\"q81n93\"\u003eScientifically calibrated passbands for measurement accuracy\u003c\/li\u003e\n\u003cli data-end=\"1239\" data-start=\"1201\" data-section-id=\"1ad2qmz\"\u003eInstallation hardware and tool set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1269\" data-start=\"1241\"\u003e\u003cstrong data-end=\"1269\" data-start=\"1241\"\u003eSpecialty Narrowband Kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"1452\" data-start=\"1270\"\u003e\n\u003cli data-end=\"1347\" data-start=\"1270\" data-section-id=\"rkp8oa\"\u003eTargeted emission-line filters (e.g., advanced\/specialized bands) on disc\u003c\/li\u003e\n\u003cli data-end=\"1415\" data-start=\"1348\" data-section-id=\"j14z4h\"\u003eDesigned for specific research or advanced imaging applications\u003c\/li\u003e\n\u003cli data-is-last-node=\"\" data-end=\"1452\" data-start=\"1416\" data-section-id=\"1g0zp3v\"\u003eInstallation hardware and tool set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/qhyccd-warranty\" target=\"_blank\"\u003eQHY's Warranty\u003c\/a\u003e\u003c\/p\u003e","brand":"QHYCCD","offers":[{"title":"LRGB+SHO (7nm)","offer_id":48842052862181,"sku":"QHY-040056","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"LRGB+SHO (3nm)","offer_id":48842052894949,"sku":"QHY-LRGB+3nmSHO","price":503.0,"currency_code":"CAD","in_stock":true},{"title":"LPF+HLP+FCE+UV\/IR Cut filters","offer_id":48842052927717,"sku":"QHY-040057","price":209.0,"currency_code":"CAD","in_stock":true},{"title":"LRGB+CH4 (20nm) + UV (40nm) + Na (10nm)","offer_id":48842052960485,"sku":"QHY-040059","price":349.0,"currency_code":"CAD","in_stock":true},{"title":"u’+g’+r’+i’+z’ sloan filters","offer_id":48842052993253,"sku":"QHY-040058","price":559.0,"currency_code":"CAD","in_stock":true},{"title":"7nm ArIII filter","offer_id":48842053026021,"sku":"QHY-040060","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/filtres.webp?v=1776541511"},{"product_id":"svbony-sv132-2-h-beta-25nm-visual-filter-w9102b","title":"SVBONY SV132 2'' H-Beta 25nm Visual Filter (W9102B)","description":"\u003ch1\u003eSVBONY SV132 2'' H-Beta 25nm Visual Filter\u003c\/h1\u003e\n\u003cp\u003eThe H-Beta filter is a narrowband filter specially designed for visual observation. It is mainly aimed at the 486nm (blue) line spectrum nebula, removes the interference of other light, and improves the contrast.\u003c\/p\u003e\n\u003cp\u003eDuring observation, in order to see sufficient dark nebula, it is necessary to ensure a large enough luminous flux with a large-aperture telescope. Small-aperture telescopes are not recommended.\u003c\/p\u003e\n\u003cp\u003eIt is suitable for observing the Horsehead Nebula in Orion and the California Nebula. Filter with metal 2\" threads fits 2\" eyepieces and diagonal barrels.\u003c\/p\u003e\n\u003ch4\u003eElusive Dark Nebula Visualization\u003c\/h4\u003e\n\u003cp\u003eUnlocks clear views of Horsehead, California and Cocoon Nebulae in dark skies, solving the problem of faint nebula invisibility.\u003c\/p\u003e\n\u003ch4\u003e486nm Blue Line Spectrum Targeting\u003c\/h4\u003e\n\u003cp\u003eFocuses on 486nm blue line spectrum nebulae, filters out interfering light to significantly improve nebula contrast.\u003c\/p\u003e\n\u003ch4\u003eLarge-Aperture Telescope Compatibility\u003c\/h4\u003e\n\u003cp\u003eRequires large-aperture telescopes to ensure sufficient luminous flux, ideal for deep-sky nebula observation in dark environments.\u003c\/p\u003e\n\u003ch4\u003eDurable Metal Mount Design\u003c\/h4\u003e\n\u003cp\u003eSturdy metal frame with precise threading, ensuring stable installation without light leakage during observation.\u003c\/p\u003e\n\u003ch4\u003e2\" Universal Fit\u003c\/h4\u003e\n\u003cp\u003eStandard 2\" filter threads, perfectly compatible with 2\" eyepieces and threaded diagonal barrels for seamless integration.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u003c\/h2\u003e\n\u003cul class=\"a-unordered-list a-vertical a-spacing-mini\"\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003e2\" Eyepiece Filter; with metal mount 2\" filter threads\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eFor Horsehead Nebula California; and Cocoon Nebulae in Dark Skies\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eMainly aimed at the 486nm (blue) line spectrum nebula; filters out the interference of other light; can improve the contrast of the nebula\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eThrough the use of filters; the Horsehead Nebula can be clearly seen; filter with metal mount 2\" filter threads; threaded to fit 2\" eyepieces and threaded diagonal barrels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"a-list-item\"\u003eTo see a sufficiently dark nebula; ensure a large enough luminous flux; needs to be observed with a large-aperture telescope\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6387029296852401851663295_1024x1024.jpg?v=1789748099\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6387029138875923094057798_1024x1024.jpg?v=1789748125\" alt=\"\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/6387029297672830308590636_1024x1024.jpg?v=1789748148\" 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x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eBlocking\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003eOD3 @300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eClear Aperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eSurface Quality\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e60\/40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eSurface parallelism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e1\/4λ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eParallelism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e30″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e\u003cstrong class=\"x1s688f\"\u003eNet Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"x1q5g3hx x1q0q8m5 xso031l x1rgnqjh x8dqpqg x1v0wz0i x1cedrb9 x1pe9zv5 xcxz95d x5xtxb0 x1c1uobl x1yc453h\"\u003e13.2g \/ 0.47oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSVBONY H-beta 25nm Filter\u003c\/li\u003e\n\u003cli\u003eSturdy Plastic Cases\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/svbony-warranty\" target=\"_blank\"\u003eSvbony 1-Year Warranty \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":52901200003301,"sku":"SVB-W9102B","price":108.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Capture_80bb2f89-cc54-45ca-a94b-10c353d174b7.jpg?v=1789748528"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/collections\/narrowband_collection.webp?v=1675438126","url":"https:\/\/istronomyplus.com\/collections\/narrowband-filters.oembed","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}