{"title":"ZWO Dual-Band Filters","description":"\u003cp\u003eThe ZWO Duo-Band passes H-alpha and OIII in a single filter, letting ZWO and other one-shot-colour cameras capture emission nebulae under light-polluted skies. It comes in 1.25\" for smaller sensors and 2\" for larger ones. Part of \u003ca href=\"\/collections\/dual-band\"\u003eDual-Band \u0026amp; Multi-Band Filters\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"zwo-duo-band-filter-1-25","title":"ZWO Duo-Band Filter 1.25\"","description":"\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eZWO 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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe dual band pass nature of the Duo-Band filter passes light at Ha (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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eIt can help improve the contrast and visibility of deep sky objects such as emission nebula using a OSC camera.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSize: Standard 1.25”\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eGlass thickness: 1.85 mm\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eBandwidth: HA (15nm) OIII (35nm)\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSurface quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSchott substrate material\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eMore than 90% transmission at major OIII line 486.nm1, 496nm and 501nm.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eMore than 80% transmission at Ha line 656.3nm\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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.\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/5.png\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cbr\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/incident-light-to-the-filter_d6aea5e9-1adb-4450-98df-5f5a79884f8e.png?v=1766555981\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"aligncenter size-full wp-image-16682\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/incident-light-to-the-filter_d6aea5e9-1adb-4450-98df-5f5a79884f8e.png?v=1766555981\" alt=\"incident-light-to-the-filter\" width=\"645\" height=\"274\" style=\"border: 0px; display: block; text-align: center; margin: auto; height: auto; max-width: 100%; padding: 0px; background: none;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003ch2 style=\"position: relative; padding: 0px 0px 10px; line-height: 28px; color: rgb(238, 57, 57); margin: 0px; font-size: 20px; font-family: \" pt sans narrow sans-serif rgb normal background-color:=\"\" font-weight:=\"\"\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eTest Results\u003c\/span\u003e\u003c\/h2\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eImages captured with ASI color cameras and Duo-Band Filters. You can see that the potential for deep space photography in strong light polluted areas is vastly improved with the Duo-Band filters.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/%E4%BF%AE%E6%94%B9%EF%BC%883%EF%BC%891.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17435\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/E4_BF_AE_E6_94_B9_EF_BC_883_EF_BC_891-947x1024_b3793829-3bc8-4c5d-986a-616a6cd9164a.jpg?v=1766555983\" alt=\"??(3)(1)\" width=\"947\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Heartwith-without-Duo-Filter1.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone wp-image-17409\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Heartwith-without-Duo-Filter1-1024x348_56bed510-5211-4d06-be4a-ab3b41c60a55.jpg?v=1766555984\" alt=\"Heart(with without)-Duo-Filter(1)\" width=\"1124\" height=\"382\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/%E4%BF%AE%E6%94%B9%EF%BC%881%EF%BC%892.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17426\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/E4_BF_AE_E6_94_B9_EF_BC_881_EF_BC_892-947x1024_aed539c2-7d79-4afc-9ade-68edc51e142c.jpg?v=1766555986\" alt=\"??(1)(2)\" width=\"947\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Horsehead-with-without-Filter1.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17411\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Horsehead-with-without-Filter1-1024x671_7acfae2e-dc32-4fe7-a761-4ecd5894da5e.jpg?v=1766555988\" alt=\"Horsehead-(with without)-Filter(1)\" width=\"1024\" height=\"671\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44013544734831,"sku":"ZWO-DB-1.25","price":139.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ZWO-Duo-Band-Filter-460x460__72535.jpg?v=1766555990"},{"product_id":"zwo-duo-band-filter-2","title":"ZWO Duo-Band Filter 2\"","description":"\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eZWO 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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eThe dual band pass nature of the Duo-Band filter passes light at Ha (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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eIt can help improve the contrast and visibility of deep sky objects such as emission nebula using a OSC camera.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSize: Standard 2”\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eGlass thickness: 1.85 mm\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eBandwidth: HA (15nm) OIII (35nm)\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSurface quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eSchott substrate material\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eMore than 90% transmission at major OIII line 486.nm1, 496nm and 501nm.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eMore than 80% transmission at Ha line 656.3nm\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\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.\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/5.png\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cbr\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/incident-light-to-the-filter_3773c5aa-f002-4da3-a58b-7f85de937a22.png?v=1766555995\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"aligncenter size-full wp-image-16682\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/incident-light-to-the-filter_3773c5aa-f002-4da3-a58b-7f85de937a22.png?v=1766555995\" alt=\"incident-light-to-the-filter\" width=\"645\" height=\"274\" style=\"border: 0px; display: block; text-align: center; margin: auto; height: auto; max-width: 100%; padding: 0px; background: none;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003ch2 style=\"position: relative; padding: 0px 0px 10px; line-height: 28px; color: rgb(238, 57, 57); margin: 0px; font-size: 20px; font-family: \" pt sans narrow sans-serif rgb normal background-color:=\"\" font-weight:=\"\"\u003e\u003cspan style=\"color: rgb(255, 0, 0);\"\u003eTest Results\u003c\/span\u003e\u003c\/h2\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003eImages captured with ASI color cameras and Duo-Band Filters. You can see that the potential for deep space photography in strong light polluted areas is vastly improved with the Duo-Band filters.\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/%E4%BF%AE%E6%94%B9%EF%BC%883%EF%BC%891.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17435\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/E4_BF_AE_E6_94_B9_EF_BC_883_EF_BC_891-947x1024_626b2682-aeeb-4189-8ef0-86adb1021193.jpg?v=1766555996\" alt=\"??(3)(1)\" width=\"947\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Heartwith-without-Duo-Filter1.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone wp-image-17409\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Heartwith-without-Duo-Filter1-1024x348_eb3ba235-0757-4867-91f3-b0312ddff1b4.jpg?v=1766555998\" alt=\"Heart(with without)-Duo-Filter(1)\" width=\"1124\" height=\"382\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e\u003cp style=\"margin: 0px; zoom: 1; padding: 0px 0px 16px; color: rgb(32, 32, 32); font-family: \" pt sans sans-serif rgb center font-size:=\"\" background-color:=\"\" text-align:=\"\"\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/%E4%BF%AE%E6%94%B9%EF%BC%881%EF%BC%892.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17426\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/E4_BF_AE_E6_94_B9_EF_BC_881_EF_BC_892-947x1024_4aa8c44b-0ed3-4a7f-825b-70a68b1aa166.jpg?v=1766555999\" alt=\"??(1)(2)\" width=\"947\" height=\"1024\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/Horsehead-with-without-Filter1.jpg\" style=\"background: transparent; color: rgb(238, 57, 57);\"\u003e\u003cimg class=\"alignnone size-large wp-image-17411\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Horsehead-with-without-Filter1-1024x671_dea20f09-d029-40e4-bd12-6815f8c2f799.jpg?v=1766556001\" alt=\"Horsehead-(with without)-Filter(1)\" width=\"1024\" height=\"671\" style=\"border: 0px; max-width: 100%; height: auto; display: block;\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":44013545029743,"sku":"ZWO-DB2","price":239.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ZWO-Duo-Band-Filter-460x460__14069.jpg?v=1766556003"}],"url":"https:\/\/ontariotelescope.com\/collections\/dual-band-zwo.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}