{"product_id":"idas-gnb-galaxy-nebula-filters","title":"IDAS GNB Galaxy \u0026 Nebula Filters","description":"\u003ch2\u003eIDAS GNB Galaxy \u0026amp; Nebula Filters\u003cbr\u003e\n\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapturing Ha \u0026amp; OIII emission lines as well as the galaxy’s broadband signal in NIR at same time\u003c\/li\u003e\n\u003cli\u003eAvailable at M28.6(1.25″) and ZF (for ZWO, QHY \u0026amp; Player One)\u003c\/li\u003e\n\u003cli\u003eBest match with Player One Uranus-C and Neptune-C II\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan class=\"style88\"\u003eThe IDAS GNB filter passes through the Ha and OIII regions in the same manner as of the IDAS NBZ to suppress light pollutions in the visible light regions. Unlike any other filters available in the market, the GNB at the same time passes through the near infrared region intended for shooting galaxies that cannot be shot with any comventional nebula filters.\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003eThe idea of designing this filter is based on the fact that the near infrared region can be hardly affected by artifical light pollution sources.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNotes:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eWe recommend the use with a NIR-enhanced sensor such as IMX585 and IMX464 especially where the GNB is used in a heavly light-polluted location.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe GNB filter will enhance the colorfulness of galaxies when used with a conventional sensor (such as IMX294).\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan class=\"style3\"\u003en.b. on halos:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOptical filters such as IDAS GNB and DTD utilizing infrared tend to cause haloing in the NUV and NIR regions. This is because the anti-reflection properties of off-the-shelf cameras' optical systems (oiptical window and sensor cover glass) are optimized for the visible spectrum only, not for the NIR region. Thus, haoling at the camera end in the unoptimized region becomes more apparent, coupled with haloing from the filter itself.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHere is a rough estimation of the magnitude of haoling where the haloing maginute of NBZ (NBZex) is counted as 1:\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGNB + IMX294 sensor results in 8.0 times\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGNB + IMX585 sensor results in 6.3 times\u003c\/span\u003e\u003cspan\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\/gnb_imx294.png?v=1717010440\" width=\"1314\" height=\"768\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eM33 Shot with GNB + IMX294\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/M33GNB1m-avr97cc.png?v=1717007617\" width=\"1388\" height=\"910\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/M33GNB1m-avr97cc.png?v=1717007617\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 235.125px;\" border=\"0\" cellspacing=\"0\"\u003e\n\u003ccolgroup width=\"266\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"255\" span=\"2\"\u003e\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 19.5938px;\" valign=\"bottom\" align=\"center\" height=\"18\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eDiameter \u0026amp; Use\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 19.5938px;\" valign=\"bottom\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eSubstrat thickness\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 19.5938px;\" valign=\"bottom\" align=\"center\"\u003e\u003cb\u003e\u003cspan style=\"color: #000000;\"\u003eModel name\u003c\/span\u003e\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 19.5938px;\" valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003e28,6 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003e2 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eGNB-28.6 \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 19.5938px;\" valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003e48 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003e2mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eGNB-48ST2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 19.5938px;\" valign=\"middle\" align=\"center\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003e52 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003e2mm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 19.5938px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eGNB-52ST2\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 97.9688px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 97.9688px;\" valign=\"middle\" align=\"left\" height=\"18\"\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: IDAS DRE Filter\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 97.9688px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eN\/A\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 97.9688px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eGNB-DRE\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 33.7289%; height: 58.7812px;\" valign=\"middle\" align=\"left\" height=\"18\"\u003e\u003cspan style=\"color: #000000;\"\u003eFor use with ZWO cams (back-focus of 6.5mm) and also IDAS AD19.4 drop-in filter mount\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.4583%; height: 58.7812px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eN\/A\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 31.3907%; height: 58.7812px;\" valign=\"middle\" align=\"center\"\u003e\u003cspan style=\"color: #000000;\"\u003eGNB-ZF \u003c\/span\u003e\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\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cp\u003e\u003cspan mce-data-marked=\"1\"\u003eIDAS GNB Filter - at selected size :\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan mce-data-marked=\"1\"\u003e28,6mm (\u003cspan style=\"color: #000000;\"\u003eGNB-28.6)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan mce-data-marked=\"1\"\u003e48mm (\u003cspan style=\"color: #000000;\"\u003eGNB-48ST2)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan mce-data-marked=\"1\"\u003e52mm (\u003cspan style=\"color: #000000;\"\u003eGNB-52ST2)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan mce-data-marked=\"1\"\u003eFItting for Canon EF-OESR (\u003cspan style=\"color: #000000;\"\u003eGNB-DRE)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan mce-data-marked=\"1\"\u003eFitting for ZWO cameras of 6.5mm back focus (\u003cspan style=\"color: #000000;\"\u003eGNB-ZF)\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\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":"M48 (2\")","offer_id":44007990165733,"sku":"IDA-GNB-48ST2","price":347.0,"currency_code":"CAD","in_stock":true},{"title":"M52","offer_id":45659116634341,"sku":"IDA-GNB-52ST2","price":417.0,"currency_code":"CAD","in_stock":true},{"title":"DRE for Canon EF-EOSR","offer_id":45659116667109,"sku":"IDA-GNB-DRT","price":459.0,"currency_code":"CAD","in_stock":false},{"title":"ZF for ZWO cameras (1.1 mm thickness)","offer_id":44007990132965,"sku":"IDA-GNB-ZF","price":316.0,"currency_code":"CAD","in_stock":true},{"title":"DS for IDAS AD42-DS","offer_id":47819522801893,"sku":"IDA-GNB-DS","price":417.0,"currency_code":"CAD","in_stock":false},{"title":"DZ for ZWO FD-M54-II","offer_id":47819589124325,"sku":"IDA-GNB-DZ","price":409.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/idas-gnb-galaxy-and-nebula-filters-astronomy-plus-1.webp?v=1690489638","url":"https:\/\/istronomyplus.com\/products\/idas-gnb-galaxy-nebula-filters","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}