{"product_id":"altair-ha-sii-oiii-dualband-ultra-4nm-filter-combo","title":"Altair Ha Sii Oiii  DualBand ULTRA 4nm  Filter COMBO","description":"\u003cdiv class=\"product-description product-page-lower-element\"\u003e\n\u003cdiv class=\"container cf\"\u003e\n\u003ch2 class=\"product-page-lower-heading grid-5 col cf\"\u003eProduct information\u003c\/h2\u003e\n\u003cdiv class=\"grid-7 col\"\u003e\n\u003cp\u003eNow you can get BOTH the 4nm DualBand Ha Oiii and the DualBand 4nm Sii Oiii filters together for a lower price!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBy using both filters individually you get twice the Oiii data \u003c\/strong\u003eyou would otherwise, plus separation of Ha and Sii Channels, so you can now do proper SHO Hubble pallette style imaging with a colour camera! \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSA customers \u003c\/strong\u003e- you can buy this filter from \u003ca href=\"https:\/\/landseaskyco.com\/collections\/filters-filter-wheels\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eLand Sea and Sky\u003c\/a\u003e in Texas or order direct from Altair. We accept orders worldwide.\u003c\/p\u003e\n\u003cp\u003eIn the box: \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4nm DualBand Ha Oiii ULTRA filter with individual test report\u003c\/li\u003e\n\u003cli\u003e4nm DualBand Sii Oiii ULTRA filter with individual test report\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable width=\"304\"\u003e\n\u003ccolgroup\u003e\n\u003ccol span=\"3\" width=\"64\"\u003e\n\u003ccol width=\"112\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"xl65\" width=\"64\" height=\"40\"\u003e \u003c\/td\u003e\n\u003ctd class=\"xl66\" width=\"64\"\u003eDualBand Sii Oii\u003c\/td\u003e\n\u003ctd class=\"xl66\" width=\"64\"\u003eDualBand Ha Oiii\u003c\/td\u003e\n\u003ctd width=\"112\"\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xl69\" width=\"64\" height=\"40\"\u003eHa\u003c\/td\u003e\n\u003ctd class=\"xl68\" width=\"64\"\u003eN\u003c\/td\u003e\n\u003ctd class=\"xl67\" width=\"64\"\u003eY\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xl69\" width=\"64\" height=\"40\"\u003eSii \u003c\/td\u003e\n\u003ctd class=\"xl67\" width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"xl68\" width=\"64\"\u003eN\u003c\/td\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"xl69\" width=\"64\" height=\"60\"\u003eOiii\u003c\/td\u003e\n\u003ctd class=\"xl67\" width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"xl67\" width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"xl70\" width=\"112\"\u003e\u003cstrong\u003e\u003cem\u003e2x the Oiii Data when used together!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThese filters allow imaging in moonlight and extreme light pollution as in a major city, with a colour CMOS camera - or even in dark conditions if you want total control over your channels.\u003c\/p\u003e\n\u003cp\u003eAs a set, the transmit the Ha, Sii and Oiii light from emission nebulae, with almost total suppression of unwanted light, with OD4\/5 or better (0.01%~0.001%) over the majority of unwanted visual wavelengths.\u003c\/p\u003e\n\u003cp\u003eIn a process pioneered by Altair, each individual filter has an individual test report, unique to that particular filter, not a blanket test report for the whole batch.\u003c\/p\u003e\n\u003cp\u003eNarrowband Bi-Colour imaging is a growing new trend in astrophotography, especially popular in light polluted areas, or bright moonlight. First, Altair brought you the TriBand and Quad Band filters, now we have the DualBand Ultra for the most extreme signal vs. background performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAltair DualBand 4nm Filter Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCapture the two main emission nebulae bands at the same time, whilst suppressing light pollution, moonlight, and airglow.\u003c\/li\u003e\n\u003cli\u003eMore data in less time, opening up your imaging window, even into the summer months when it isn't quite dark yet. Capture twice the Oiii data, whilst obtaining Sii to complement the Altair Ha Oiii DualBand filter.\u003c\/li\u003e\n\u003cli\u003eExtremely steep bandpass yields maximum contrast in extreme light pollution: 4nm FHWM centred precisely on the target wavelengths.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo halos\u003c\/strong\u003e. We have not had any reports of halos caused by this filter in testing and we don't expect any with these new special coatings.\u003c\/li\u003e\n\u003cli\u003eCan be used with One Shot Colour (OSC) CMOS or mono astronomical cameras for luminance data.\u003c\/li\u003e\n\u003cli\u003eIncludes UVIR blocking for both modified and un-modified DSLR cameras, plus an anti-reflection coating for halo suppression. To see the AR coating in action, please see images demonstrating the same filter with and without the AR coating on the bright star, Capella in exactly the same conditions with the same settings.\u003c\/li\u003e\n\u003cli\u003eBest performance at focal ratios as fast as F4.8, with contrast increasing as focal ratio increases. \u003ca href=\"https:\/\/www.altairastro.help\/info-instructions\/cmos\/affects-of-telescope-focal-ratio-on-light-pollution-filter-performance\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMore info about light pollution filter performance and focal ratio here.\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe 2\" filter has standard M48x0.75mm thread, and fits inside the Altair Magnetic Filter holders, standard 2\" filter wheels, plus the Altair Canon \/ Nikon DSLR lens to astro CMOS adaptors. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAltair 4nm DualBand Sii Oiii ULTRA Filter Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1st band, Oiii CWL500.7nm FWHM 4nm tolerance ~0.5nm, T% 90%\u003c\/li\u003e\n\u003cli\u003e2nd band, Sii CWL 671.6nm FWHM 4nm tolerance ~0.5nm T% 90%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAltair 4nm DualBand Ha Oiii ULTRA Filter Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1st band, Oiii CWL500.7nm FWHM 4nm tolerance ~0.5nm, T% 88%~91%\u003c\/li\u003e\n\u003cli\u003e2nd band, Ha CWL 656.3nm FWHM 4nm tolerance ~0.5nm T% 90%~94%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBoth filters shared specifications: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eParfocal 1.85mm thick optical glass with 30 arc sec parallelism.\u003c\/li\u003e\n\u003cli\u003eIndividual spectrographic test report for guaranteed quality and performance\u003c\/li\u003e\n\u003cli\u003eOD4\/5 Blocking (0.01%~0.001%) over the majority of unwanted wavelengths\u003c\/li\u003e\n\u003cli\u003eSi02 \"hard\" overcoat with UVIR Block and Anti-Reflection Coating for durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How to OSC Narrowband filters work?\u003c\/strong\u003e Altair OSC narrowband filters work by isolating the primary nebulae emission zones in the red and blue wavelengths, and separating them into two main \"zones\" with a wide separation for easy capture with a colour camera - all in one exposure! Not only is capture more convenient with one filter, but processing is easy too, thanks to the wide separation of the green\/blue and red \"zones\". Light pollution control is extremely effective and LED light is also significantly reduced.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eQ: What does \"DualBand\" mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThere are 3 types of OSC line filters in the Altair range:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eDual-Band - the allowing only the thinnest peaks of Ha 656.3nm (or Sii6 71.6nm) and 500.7nm Oiii light from emission nebulae through. (Recommended for extreme light pollution in the worst possible conditions).\u003c\/li\u003e\n\u003cli\u003eTri-Band - combines Ha into a red zone, and H-beta + Oiii into a green\/blue zone. (For urban light pollution).\u003c\/li\u003e\n\u003cli\u003eQuad Band - combines Sii AND Ha into a red zone, and H-beta + Oiii into a green\/blue zone. (For suburban \/ moderate light pollution).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ctable border=\"0\" width=\"320\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"40\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003eDualBand Sii Oiii\u003c\/td\u003e\n\u003ctd width=\"64\"\u003eDualBand Ha Oiii\u003c\/td\u003e\n\u003ctd width=\"64\"\u003eTriBand\u003c\/td\u003e\n\u003ctd width=\"64\"\u003eQuadBand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"40\"\u003eH-alpha 656.3nm\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"40\"\u003eOiii 500.7nm\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"60\"\u003eOiii 495.9nm\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"40\"\u003eSii 672nm \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eY\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\" height=\"20\"\u003e \u003c\/td\u003e\n\u003ctd width=\"64\"\u003e2x Bands\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e2x Bands\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e3x Bands\u003c\/td\u003e\n\u003ctd width=\"64\"\u003e4x Bands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eSensitive OSC or \"One Shot Colour\" CMOS cameras like the Altair Hypercam capture these wavelengths very efficiently, and allow them through the Bayer matrix. The filters also work with DSLRs (APS-C sensor size modified cameras are best, but normal ones will also work). When you have the complete stack of exposures, processing is relatively easy because of the large separation in colour. You can also use these filters as a \"super luminance filter\" for imaging nebulae with Mono cameras.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE: Demand for this product is very high and they are made in small batches. We sometimes temporarily suspend order to allow production to catch up.\u003c\/strong\u003e When we catch up with backorders we will re-enable ordering. We apologize for any inconvenience. Altair and Dealers reserve the right to change product specification and price without notice.\u003c\/p\u003e\n\u003cdiv class=\"brand-message\"\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-specifications product-page-lower-element\"\u003e\n\u003cdiv class=\"container cf\"\u003e\n\u003ch2 class=\"product-page-lower-heading grid-5 col cf\"\u003eProduct Info\u003c\/h2\u003e\n\u003cdiv class=\"grid-7 col\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_2_GTIN_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_GTIN_NAME\" class=\"ekmProductAttributeName\"\u003eGTIN\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_GTIN_VALUE\" class=\"ekmProductAttributeItem\"\u003e0747742379109\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_2_SKU_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_SKU_NAME\" class=\"ekmProductAttributeName\"\u003eMPN\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_SKU_VALUE\" class=\"ekmProductAttributeItem\"\u003eF200DB4NM-HSO-COMBO\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_2_MPN_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_MPN_NAME\" class=\"ekmProductAttributeName\"\u003eMPN\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTATRRIBUTE_2_MPN_VALUE\" class=\"ekmProductAttributeItem\"\u003eF200DB4NM-HSO-COMBO\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_2_BRAND_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\u003cspan class=\"ekmProductAttributeName\"\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTBRAND\"\u003eAltair\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_2_PRODUCTCODE_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\u003cspan class=\"ekmProductAttributeName\"\u003eProduct Code\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTCODE\"\u003eF200DB4NM-HSO-COMBO\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"_EKM_PRODUCTATRRIBUTE_3_WEIGHT_WRAPPER\" class=\"ekmProductAttributeWrapper\"\u003e\n\u003ctd\u003e\n\u003cdiv class=\"weight-label\"\u003eDelivery Weight Package\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan id=\"_EKM_PRODUCTWEIGHT_1\"\u003e0.5kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Land Sea \u0026 Sky","offers":[{"title":"Default Title","offer_id":46718052040876,"sku":"F200DB4NM-HSO-COMBO","price":883.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/8073\/3868\/files\/1d1f6bf5-f889-4840-9202-11419443dc8a.jpg?v=1783108515","url":"https:\/\/landseaskyco.com\/products\/altair-ha-sii-oiii-dualband-ultra-4nm-filter-combo","provider":"Land Sea \u0026 Sky","version":"1.0","type":"link"}