{"product_id":"idas-nb1-nebula-booster-filter","title":"IDAS NB1 Nebula Booster Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDual-band filter for One-Shot-Color (OSC) cameras\u003c\/li\u003e\n\u003cli\u003ePasses H-Alpha, NII, H-Beta, and OIII emission lines\u003c\/li\u003e\n\u003cli\u003e~20nm and ~32nm bandpasses\u003c\/li\u003e\n\u003cli\u003ePassband shifted toward longer wavelengths to allow for oblique light (up to about 14°)\u003c\/li\u003e\n\u003cli\u003e1.1mm substrate thickness\u003c\/li\u003e\n\u003cli\u003eDurable IGAD (Ion-Gun Assist Deposition) coatings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eIDAS NB1 Nebula Booster Filter\u003c\/h2\u003e\n\u003cp\u003eThe IDAS NB1 Nebula Booster is a dual-band interference filter that isolates key emission nebula wavelengths for one-shot-color cameras, using a ~20nm bandpass for H-beta\/OIII and a wider ~32nm bandpass for H-alpha\/NII. Its passband is deliberately shifted toward longer wavelengths so the emission lines stay inside it when light arrives at an angle, up to about 14 degrees.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Dual-Band Nebula Filter for One-Shot-Color Cameras\u003c\/h3\u003e\n\u003cp\u003eIDAS designed the NB1 so that one-shot color cameras can record the H-beta, OIII, H-alpha and NII ranges of emission nebulae at higher contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e~20nm \u0026amp; ~32nm Bandpasses for Key Emission Lines\u003c\/h3\u003e\n\u003cp\u003eUnlike broadband light pollution filters, the NB1 uses two specific bandpasses to target nebula emissions. A ~20nm window captures the blue-green light of H-beta and OIII, while a separate ~32nm window allows the red light of H-alpha and NII to pass through.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDesigned for f\/2 Systems up to 14° Incidence\u003c\/h3\u003e\n\u003cp\u003eA known issue with interference filters is \"band-shift,\" where the filter's transmission window moves toward shorter wavelengths as the angle of incoming light becomes more oblique—a common problem with fast telescopes. The IDAS NB1's transmission range is intentionally shifted slightly to the red to compensate for this effect. The NB1 passes almost all of these emission lines when the incidence of the light is kept below 14 degrees. Between the lens and an APS-C camera, a lens with a back focal distance of 40mm or more at f\/2 keeps the averaged incidence angle within about 14 degrees; lenses with a small rear element can exceed it at the edges of the frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIGAD Coatings: Quartz-Hard Durability and Stability\u003c\/h3\u003e\n\u003cp\u003eThe NB1 filter utilizes IDAS's proprietary IGAD (Ion-Gun Assist Deposition) coating technology. This process creates multi-layer coatings that are densified and hardened to a level equivalent to quartz glass. The process greatly improves adhesion between the substrate and the coating, and the spectral characteristics show almost no aging from temperature and humidity changes in normal living environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDrop-In Formats: ZF for ZWO \u0026amp; DS for AD42 Adapters\u003c\/h3\u003e\n\u003cp\u003eThe NB1 is offered here in two drop-in formats. The AD42-DS adapter is sold separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZF Format:\u003c\/strong\u003e Designed to drop into the T-ring of ZWO cameras with an M42 male-mount and a 6.5mm flange back distance. It is also compatible with the IDAS AD19.4 drop-in mount adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDS Format:\u003c\/strong\u003e Designed specifically for use with the IDAS AD42-DS drop-in mount adapter, which provides M42 female threads and camera rotation capabilities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the IDAS NB1 filter improve images from my one-shot-color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eIDAS NB1\u003c\/strong\u003e acts like two filters in one for your OSC camera. It has two specific windows, or bandpasses, that let through the red light of Hydrogen-alpha and the blue-green light of Oxygen-III and Hydrogen-beta. This raises the contrast of emission nebulae in a single color exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the IDAS NB1 filter with my fast f\/2 RASA telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFast systems send light through the filter at steeper angles, which shifts the passband of any interference filter toward shorter wavelengths. The NB1's passband is shifted toward longer wavelengths to allow for this, and it passes almost all of the emission lines when the incidence angle stays below 14 degrees. The ZF format also fits the IDAS AD19.4 drop-in mount used on the RASA 8.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the ZF and DS formats for the IDAS NB1?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe format you need depends on your camera setup.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eZF format\u003c\/strong\u003e is designed to drop directly into the M42 T-ring of compatible ZWO cameras, which typically have a 6.5mm flange back.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003eDS format\u003c\/strong\u003e is designed for the IDAS AD42-DS drop-in adapter, which is a separate accessory that threads into an M42 imaging train.\u003c\/li\u003e\n\u003c\/ul\u003e\nAlways check your camera's threading and flange distance to choose the correct version.\n\u003c\/div\u003e\n\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow should I clean my IDAS NB1 filter if it gets dusty or smudged?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, always use an air blower to remove any loose dust or gritty particles. If stains remain, use a lens cleaning paper with a few drops of a \u003cstrong\u003eneutral\u003c\/strong\u003e (not acidic or alkaline) lens cleaning fluid and wipe gently. A silicone-impregnated cloth can also be used after blowing off dust.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the NB1's transmittance range intentionally shifted?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis refers to the filter's built-in compensation for fast optics. On telescopes with steep light cones (e.g., f\/2), the angle of incidence causes a filter's passband to shift toward the blue end of the spectrum. By pre-shifting the \u003cstrong\u003eIDAS NB1's\u003c\/strong\u003e passband slightly toward the red, the design makes sure that when this blue-shift occurs, the passband lands correctly on the target emission lines (like H-alpha) instead of moving past them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eIDAS (ICAS Enterprises, Japan)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Formats\u003c\/td\u003e\n\u003ctd\u003eDS drop-in (for IDAS AD42-DS adapter); ZF (for ZWO M42 cameras with 6.5mm backfocus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate Thickness\u003c\/td\u003e\n\u003ctd\u003e1.1mm (both DS and ZF formats)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating Type\u003c\/td\u003e\n\u003ctd\u003eInterference filter with IGAD (Ion-Gun Assist Deposition) technology\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eIDAS NB1 Nebula Booster Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (format chosen at checkout)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul style=\"list-style: none; padding-left: 0;\"\u003e\n\u003cli style=\"margin-bottom: 1em;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/idas-zf-filter-manual.pdf\" target=\"_blank\"\u003eIDAS ZF Filter Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 1em;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/idas-ad42-ds-drop-in-adapter-manual.pdf\" target=\"_blank\"\u003eIDAS AD42-DS Drop-in Adapter Manual (for DS filters)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 1em;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/idas-filter-cleaning-procedure.pdf\" target=\"_blank\"\u003eIDAS Filter Cleaning Procedure\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContact us for warranty details.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IDAS","offers":[{"title":"DS drop-in (IDAS AD42-DS)","offer_id":68030114398493,"sku":"IDA-NB1-DS","price":212.0,"currency_code":"USD","in_stock":true},{"title":"ZF (ZWO cameras)","offer_id":68030114431261,"sku":"IDA-NB1-ZF","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/idas-nb1-nebula-booster-filter-1.png?v=1794332106","url":"https:\/\/davidastro.com\/en-us\/products\/idas-nb1-nebula-booster-filter","provider":"David Astro","version":"1.0","type":"link"}