{"product_id":"idas-2-nbz-ii-10nm-ha-8nm-oiii-dual-band-filter","title":"IDAS 2\" NBZ-II 10nm Ha \u0026 8nm OIII Dual Band Filter","description":"\u003ch2 data-mce-fragment=\"1\"\u003eIDAS 2\" NBZ-II 10nm Ha \u0026amp; 8nm OIII Dual Band Filter\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe IDAS NBZ-II is a new dual band nebula booster filter - the successor to the NBZ (NBZex) filter. The FWHM of the NBZ-II is 8nm (+\/=0.4nm) at OIII, and 10nm (+\/-0.4nm) at H-alpha respectively. This has the same anti-Haloing characteristics as the NBZ did. A test report of the actually measured optical properties is provided with each individual NBZ-II filter piece shipped.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe transmittance curve of interference filters will naturally shift towards the shorter wave length side against oblique light incidence, and this tendency will be more noticeable as the inncidence angle becomes higher as shown in the 3rd photo above.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSome of the competitive 7nm or narrower filters will decrease in transmittance by 50% or more when used in a fast optical system (around F2), while the NBZ=II retains 80% or more of the transmittance under the same conditions.\u003c\/p\u003e\n\u003cp id=\"G0OU7F6\" data-mce-fragment=\"1\"\u003eThe shift tendency will be stronger in optical systems that have a central obstruction. Taking this into consideration, we have designed the NBZ-II as you can see from the simulation in the 4th photo above.\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2\" mounted; M48mm x 0.75mm\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 2.0mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNBZ II Filter\u003c\/li\u003e\n\u003cli\u003eIndividual spectrographic test report\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eIDAS 3-Year Warranty\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e","brand":"IDAS","offers":[{"title":"48mm","offer_id":45659531542757,"sku":"IDA-NBZ-II-48ST2","price":417.0,"currency_code":"CAD","in_stock":true},{"title":"52mm","offer_id":47816626962661,"sku":"IDA-NBZ-II-52ST2","price":445.0,"currency_code":"CAD","in_stock":true},{"title":"Di2 drop in filter","offer_id":45659531575525,"sku":"IDA-NBZ-II-Di2","price":445.0,"currency_code":"CAD","in_stock":true},{"title":"DRT for Canon EF-EOSR","offer_id":45659531608293,"sku":"IDA-NBZ-II-DRT","price":487.0,"currency_code":"CAD","in_stock":true},{"title":"DZ for use with ZWO cams","offer_id":47816617394405,"sku":"IDA-NBZ-II-DZ","price":417.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/idas-2-nbz-ii-10nm-ha-and-8nm-oiii-dual-band-filter-astronomy-plus-1.png?v=1715808232","url":"https:\/\/istronomyplus.com\/products\/idas-2-nbz-ii-10nm-ha-8nm-oiii-dual-band-filter","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}