{"product_id":"svbony-sv220-2-dual-band-7nm-ha-oiii-filter-w9172b-open-box-1","title":"Svbony SV220 2\" Dual Band 7nm HA \u0026 OIII Filter - W9172B (OPEN BOX)","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(244, 11, 11);\"\u003eIn Mint Condition\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSvbony Dual-Band 7nm H-Alpha\/OIII 2\" Filter\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThis Svbony H-Alpha\/OIII 7nm Narrowband Filter is designed for astrophotography in dark skies as well as a light polluted environment. Take color images without the need for separate Oxygen III and H-Alpha filters. The Dual-Band Filter is useful for imaging emission nebulae, planetary nebulae and supernova remnants. It will also sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow...and even moonlight...drastically reducing the effects of natural and artificial light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 7nm bandwidth strongly isolates red (H-alpha) and green\/blue (OIII) emissions while blocking light pollution.  This maximizes the nebula's signal and darkens the background sky at the same time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003eNote:  This filter is designed for focal ratios of f\/5 and slower.  \u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnection Chart: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" height=\"341\" width=\"551\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/Mounting_Options.jpg?v=1717792571\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand:  Svbony\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eModel: SV220\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eName:  Duo-Band OSC Filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSize:  2\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate Thickness:  1.80mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eClear Aperture:  44 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWavelength Range:  300 - 1100 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM:  OIII (7nm), H-Alpha (7nm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eBlocking:  OD5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003ePeak transmittance:  500.7m@T\u0026gt; 90%; 656.3m@T\u0026gt;94%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSurface quality:60\/40\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSurface parallelism:  1\/4A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThread:  M48x0.75\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSingle Thread:  Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eNet Weight:  12.5g \/ 0.44oz \/0.027lb\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Svbony","offers":[{"title":"Default Title","offer_id":43437259554929,"sku":"USED061009","price":119.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/Dual_Band_Filter_Standing_2.jpg?v=1781116053","url":"https:\/\/khanscope.com\/products\/svbony-sv220-2-dual-band-7nm-ha-oiii-filter-w9172b-open-box-1","provider":"Khan Scope Centre","version":"1.0","type":"link"}