{"title":"Askar Dual \u0026 Multi-Band Filters","description":"\u003cp\u003eAskar dual \u0026amp; multi-band filters. Part of \u003ca href=\"\/collections\/askar-filters\"\u003eAskar Filters\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"askar-color-magic-duo-narrowband-6nm-d1-h-a-o-iii-imaging-filter-2-mounted","title":"Askar Color Magic Duo-Narrowband 6nm \"D1\" H-a \u0026 O-III Imaging Filter - 2\" Mounted","description":"\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\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\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\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\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\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\/div\u003e\u003cdiv\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong style=\"outline: none; box-sizing: border-box;\"\u003eAskar 6nm Duo-narrowband Filter (OIII \u0026amp; Ha)\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\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.\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003e \u003cbr style=\"outline: none; box-sizing: border-box;\"\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\/div\u003e\n\u003cspan style=\"font-family: Arial;\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: center\u003e\u003c\/span\u003e\u003cdiv style=\"outline: none; box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size:\u003e\u003cspan style=\"font-family: Arial;\"\u003e6nm Duo-narrowband Filter (OIII \u0026amp; Ha) 2”\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eFWHM: 6nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eCWL: 500.7nm \u0026amp; 656.3nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003ePeak transmittance:90%\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eThickness:1.85 ± 0.05mm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eBarrier property:=OD5 @ 200-1100nm\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eSurface finish:60\/40\u003cbr style=\"outline: none; box-sizing: border-box;\"\u003eParallelism:30”\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013854720111,"sku":"ASK-D1","price":463.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D1__61407.1682636061.1280.1280.jpg?v=1766564673"},{"product_id":"askar-colour-magic-6nm-d-filter-package","title":"Askar Colour Magic 6nm D Filter Package","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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\u003cdiv\u003e\n\u003cdiv style=\"text-align: justify;\"\u003e\u003cspan style=\"font-size: 14px; font-family: ????, \" microsoft yahei color: rgb\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eAfter the 2\" 6nm duo-narrowband filter (Ha+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 (Ha+OIII) and a color camera, users will have remarkable results.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eUsually in astrophotography, the Ha signal-to-noise ratio is stronger while the OIII is relatively weak. As our two duo-narrowband filters are Ha+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.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eWe name the  Ha+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.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/3_1.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eThe Askar D filter set offers a new option for astronomy enthusiasts and is sure to please.\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/166684115958.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cimg alt=\"\" src=\"https:\/\/www.askarlens.com\/Upload\/166684105298.jpg\" style=\"outline: none; box-sizing: border-box; border: 0px; max-width: 100%; transition: all 0.3s ease 0s; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify width:\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013857800303,"sku":"Ask-D-Combo","price":906.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D1D2__02366.1682641095.1280.1280.jpg?v=1766564860"},{"product_id":"askar-colour-magic-6nm-deep-sky-duo-narrowband-filter-oiii-sii","title":"Askar Colour Magic 6nm Deep-sky Duo Narrowband Filter (OIII+SII)","description":"\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei justify font-size:=\"\" text-align:=\"\"\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\u003cdiv\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/div\u003e\u003cdiv\u003e\n\u003cstrong style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eColour Magic 6nm Duo-narrowband Filter (OIII \u0026amp; SII)\u003c\/strong\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\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 style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e \u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e6nm Duo-narrowband Filter (OIII \u0026amp; SII) 2”\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eFWHM: 6nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eCWL: 500.7nm \u0026amp; 671nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003ePeak transmittance:90%\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eThickness:1.85 ± 0.05mm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eBarrier property:=OD5 @ 200-1100nm\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eSurface finish:60\/40\u003c\/span\u003e\u003cbr style=\"outline: none; box-sizing: border-box; color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003e\u003cspan style=\"color: rgb(68, 68, 68); font-family: ????, \" microsoft yahei font-size: text-align: justify\u003eParallelism:30”\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44013857931375,"sku":"Ask-D2","price":463.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_252520D2__21718.1682641096.1280.1280.jpg?v=1766564866"},{"product_id":"askar-c1-duo-band-ha-oiii-filter","title":"Askar C1 Duo-band Ha+OIII filter","description":"\u003cp\u003e\u003cspan\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\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC1 Duo-band Filter (OIII \u0026amp; Ha) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e OIII：35nm±5nm\/Ha：15nm±3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\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\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e90%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eOD3 @ 200-1000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e60\/40\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\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Filters VS D Filters\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\u003cimg id=\"1744242701691588608\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/d9fc62ca-200d-4a8d-97da-271704275a65.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Transmittance\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\u003cimg id=\"1737360492640669696\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/ee17a63e-9952-4318-948b-5c899d9a6cb1.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-2\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-3\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg id=\"1737361294995132416\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/7793cf4b-19ea-4534-8384-94312e50ffa8.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIC 1848 Soul Nebula(HOO)  |  ASKAR 103APO+0.6x Full-frame Reducer+ASI 2600MC Pro  |  Colour Magic C1 Duo-band Filter (Hα+OIII)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014116307055,"sku":"Colourmagic-C1","price":169.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_C1__52135.png?v=1766571845"},{"product_id":"colour-magic-c2-duo-band-filter-sii-oiii","title":"Colour Magic C2 Duo-band Filter (SII+OIII)","description":"\u003cp\u003e\u003cspan\u003eColour Magic C 2\" Duo-band filter is a professional astrophotography tool specifically designed for deep-sky imaging. The Colour Magic C2 duo-band filter is SII+OIII filter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"ie_text-1703049718429\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\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\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_text-1703049761038\" class=\"reset_style\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\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\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC2 Duo-band Filter (OIII \u0026amp; SⅡ) 2”\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFWHM\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e OIII：35nm±5nm\/SⅡ：15nm±3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCWL\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\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\u003e\u003cstrong\u003ePeak transmittance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e90%\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2 ± 0.05mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBarrier property\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eOD3 @ 200-1000nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSurface finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e60\/40\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\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Filters VS D Filters\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\u003cimg id=\"1744242701691588608\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/d9fc62ca-200d-4a8d-97da-271704275a65.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eC Transmittance\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\u003cimg id=\"1737360492925882368\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/323c00e7-5b5e-4cd0-aa35-63b46d222edc.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-2\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-3\" class=\"cbox-15 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-18 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-17 s_title clearfix response-transition\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg id=\"1737361320663388160\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/b2dd3440-07a9-4ff9-8aa9-47dc53dfa253.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIC 1848 Soul Nebula(SOO)  |  ASKAR 103APO+0.6x Full-frame Reducer+ASI 2600MC Pro  |  Colour Magic C2 Duo-band Filter (SII+OIII)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":44014116470895,"sku":"Colourmagic-C2","price":169.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Askar_C2__16649.png?v=1766571859"}],"url":"https:\/\/ontariotelescope.com\/collections\/askar-dual-band.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}