{"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\u003eZWO 2-Years Warranty\u003c\/p\u003e\n\u003cp\u003eZWO General Product \u0026amp; Software Manuals\u003c\/p\u003e\n\u003cp\u003eZWO Duo-Band Filter Transmission Curve\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"1.25\" Round Mounted","offer_id":51317671657508,"sku":"ktv1787936905833","price":70.31,"currency_code":"USD","in_stock":true},{"title":"2\" Round Mounted","offer_id":51317671690276,"sku":"fbx1787936905834","price":122.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/3547\/4212\/files\/zwo-duo-band-filter_1.png?v=1787936914","url":"https:\/\/groveway.shop\/products\/zwo-duo-band-filter","provider":"My Store","version":"1.0","type":"link"}