{"title":"Antlia Filters","description":"\u003cp\u003eAntlia filters cover most needs of deep-sky and planetary imaging. For nebulae there are narrowband filters from 2.5nm to 7nm, ALP-T dual band filters for one-shot color cameras and LRGB sets for monochrome cameras, along with the Triband RGB Ultra V2.\u003c\/p\u003e\u003cp\u003eVisual observers can use the 8-EL UHC Pro on nebulae, and planetary imagers will find specialized filters such as the U-Venus for cloud detail on Venus and the CH4 Methane filter for the giant planets.\u003c\/p\u003e","products":[{"product_id":"antlia-lrgb-v-pro-filter-set","title":"Antlia LRGB-V Pro Filter Set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFour-Filter LRGB Complement\u003c\/li\u003e\n\u003cli\u003eEngineered for Monochrome CMOS\/CCD Cameras\u003c\/li\u003e\n\u003cli\u003eAnti-Reflection Coated Optics\u003c\/li\u003e\n\u003cli\u003eAvailable in 5 Mounted and Unmounted Sizes\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\u003eAntlia LRGB-V Pro Filter Set\u003c\/h2\u003e\n\u003cp\u003eThe Antlia LRGB-V Pro Filter Set is the foundation for creating detailed, true-color astronomical images with modern monochrome cameras, offered in 5 distinct sizes to integrate into any optical train. This four-filter system isolates the primary red, green, and blue wavelengths, plus a high-transmission luminance channel, allowing you to capture deep-sky objects with accurate color rendition and maximum detail. By capturing each channel separately, you gain complete control over color balance and contrast during processing.\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\u003eLRGB-V Pro: A 4-Filter System for Monochrome Imaging\u003c\/h3\u003e\n\u003cp\u003eShooting with a monochrome sensor and an LRGB filter set is the definitive method for high-fidelity astrophotography. The Antlia LRGB-V Pro set enables this by separating the incoming light into four distinct channels. The high-transmission Luminance (L) filter captures fine detail and signal depth, while the Red (R), Green (G), and Blue (B) filters gather the color information, which is later combined to create a final, full-color image far richer than what a one-shot color camera can produce.\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\u003eAntlia V-Pro Series Optical Engineering\u003c\/h3\u003e\n\u003cp\u003eThe \"V-Pro\" designation signifies Antlia's commitment to optical precision for serious imagers. Each filter in the set is designed to minimize internal reflections and halos around bright stars through advanced anti-reflection coatings. This ensures that the signal from your target is preserved with high contrast against a dark sky background. The filters are engineered to be parfocal, meaning you shouldn't need to refocus when switching between the L, R, G, and B filters, saving valuable imaging time and preventing image shift.\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\u003e5 Filter Formats for Any Modern Imaging Train\u003c\/h3\u003e\n\u003cp\u003eTo prevent vignetting and accommodate different sensor sizes, the Antlia LRGB-V Pro Filter Set is available in 5 standard formats. This selection ensures a match for nearly any filter wheel or filter drawer on the market, from small planetary setups to large-format deep-sky systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounted (1.25\" \u0026amp; 2\"):\u003c\/strong\u003e Thread directly into standard filter wheels and drawers, offering protection and easy handling for cameras with smaller to medium-sized sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnmounted (31mm, 36mm, \u0026amp; 50mm):\u003c\/strong\u003e Designed for modern filter wheels that use retaining rings or carousels. The larger 36mm and 50mm sizes are essential for preventing vignetting on full-frame and larger sensors, especially in fast optical systems.\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\"\u003eWhat is the advantage of using the Antlia LRGB-V Pro set over a color camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing the Antlia LRGB-V Pro filters with a monochrome camera allows you to capture significantly more signal, especially through the clear Luminance filter. This results in sharper, more detailed final images. You also gain complete control over the color balance in post-processing, which is not possible with a one-shot-color camera's fixed Bayer matrix.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAre the Antlia LRGB-V Pro filters parfocal?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, filters in the V-Pro series are designed to be parfocal. This means that after achieving focus with one filter (typically the Luminance), you should be able to switch to the R, G, or B filters without a significant change in focus. This is a critical feature that streamlines automated imaging sequences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose between mounted and unmounted Antlia LRGB-V Pro filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYour choice depends on your filter wheel or drawer. \u003cstrong\u003eMounted filters (1.25\" and 2\")\u003c\/strong\u003e screw directly into threaded ports and are easier to handle. \u003cstrong\u003eUnmounted filters (31mm, 36mm, 50mm)\u003c\/strong\u003e are required for many modern filter wheels that clamp the filter in place, and they often provide a larger clear aperture for a given size, which helps reduce vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is a good starting exposure ratio for the Antlia LRGB-V Pro set on a galaxy like the Triangulum Galaxy (M33)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA common starting point for LRGB imaging on a galaxy is a 1:1:1 ratio for the RGB channels, with the Luminance channel receiving at least three times the total exposure of a single color channel. For M33, you might start with L: 15 minutes, R: 5 minutes, G: 5 minutes, B: 5 minutes, and then adjust based on your sky conditions and camera's sensitivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 36mm unmounted Antlia filters work with my 8\" f\/4 Newtonian and an APS-C sensor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 36mm unmounted filter size is an excellent match for that combination. An f\/4 Newtonian produces a steep light cone, and the 36mm format provides a sufficient clear aperture to fully illuminate an APS-C sensor without significant vignetting, which could be a problem with smaller 1.25\" filters in such a fast system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a UV\/IR cut filter with the Antlia LRGB-V Pro set?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, you do not. The Luminance filter in the Antlia LRGB-V Pro set has built-in UV and IR blocking, and the individual R, G, and B filters only pass their specific visible light bandpasses. This ensures that only the desired wavelengths of light reach the sensor, resulting in sharper stars and better color fidelity.\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\u003eAvailable Formats\u003c\/td\u003e\n\u003ctd\u003e1.25\" Mounted, 31mm Unmounted, 36mm Unmounted, 2\" Mounted, 50mm Unmounted\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\"\u003eLuminance (L) Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (In selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRed (R) Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (In selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGreen (G) Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (In selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBlue (B) Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (In selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Filter Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNo downloads are available for this product.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis product is covered by Antlia's standard warranty.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":44968069628189,"sku":"ANT-LRGB-1.25","price":426.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":44968069660957,"sku":"ANT-LRGB-RD31","price":454.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":44968069693725,"sku":"ANT-LRGB-RD36","price":511.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":44968069726493,"sku":"ANT-LRGB-2","price":667.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":44968069759261,"sku":"ANT-LRGB-RD50","price":852.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-LRGB-Filter-Set__87918.1670360421.1280.1280.jpg?v=1684348658"},{"product_id":"antlia-3nm-narrowband-h-alpha-pro-filter","title":"Antlia 3nm Narrowband H-alpha Pro Filter","description":"\u003cul\u003e\n  \u003cli\u003e656.3nm H-alpha Central Wavelength\u003c\/li\u003e\n  \u003cli\u003eSmall 3nm FHWM\u003c\/li\u003e\n  \u003cli\u003eHigh \u0026gt;88% Peak Transmission\u003c\/li\u003e\n  \u003cli\u003eMinimized halos on bright stars\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm H-Alpha Pro Filter, the pinnacle of precision for narrowband astrophotography. Engineered to feature a Full Width Half Maximum (FWHM) of just 3nm, this filter dramatically enhances the contrast of emission targets by significantly reducing unwanted background signals. Designed for astrophotographers aiming to capture detailed structures within nebulae, the Antlia H-Alpha 3nm Pro achieves an impressive 88% transmission at the 656.3nm hydrogen-alpha line, ensuring you capture the maximum signal for vivid, well-defined images.\u003c\/p\u003e\n\u003cp\u003eThe Antlia 3nm H-Alpha Pro is optimized for both long focal ratios and fast optical systems, maintaining high transmittance with minimal signal loss even in setups as fast as f\/3. This adaptability is bolstered by blue-shift data that confirms compatibility with high-speed systems like Hyperstar and RASA without sacrificing quality. Its exceptional out-of-band blocking, rated at OD5 (0.001%), provides outstanding signal-to-noise ratio and effectively minimizes interference from other wavelengths, sharpening each capture.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteep Spectral Profile\u003c\/strong\u003e: Minimizes halos around bright stars, enhancing clarity and detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Design\u003c\/strong\u003e: Eliminates internal reflections, ensuring pure and crisp images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for capturing H-alpha emission nebulae, planetary nebulae, Wolf-Rayet nebulae, and supernova remnants. It performs superbly in both light-polluted areas and dark sites, extending imaging opportunities even when the moon is up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All filters are edge blackened to eliminate internal reflections from stray light, further improving image quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Built on a Schott optical substrate with a surface quality of 60\/40 (scratch\/dig), a transmitted wavefront of Lambda\/4 or better, and parallelism less than 30 arcseconds, it meets stringent standards for optical performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHowever, it's important to note that the Antlia 3nm H-Alpha Pro filter is specifically tailored for deep sky objects that emit in the hydrogen-alpha line and will not be suitable for objects without H-alpha emissions.\u003c\/p\u003e\n\u003cp\u003eWith its superior design and technological advancements, the Antlia 3nm H-Alpha Pro Filter is an indispensable tool for astrophotographers seeking to push the boundaries of what's visible in the night sky.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. H-alpha filters designed for solar applications are significantly narrower and specifically engineered to handle the intense light from the sun. Attempting to use this deep sky astrophotography filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSchott optical substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e656.3nmnm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e＞88%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":44968069824797,"sku":"ANT-HA-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":44968069857565,"sku":"ANT-HA-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":44968069890333,"sku":"ANT-HA-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":44968069923101,"sku":"ANT-HA-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":44968069955869,"sku":"ANT-HA-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-Ha-Pro__26276.1670360748.1280.1280.jpg?v=1770824812"},{"product_id":"antlia-3nm-narrowband-oiii-pro-filter","title":"Antlia 3nm Narrowband OIII Pro Filter","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003eAntlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm\u003c\/span\u003e\u003cspan\u003e\u003cins cite=\"mailto:Ted%20Dobosz\" datetime=\"2021-01-06T13:06\"\u003e\u003c\/ins\u003e\u003c\/span\u003e\u003cspan\u003ebandpass\u003c\/span\u003e\u003cspan\u003e. \u003c\/span\u003e\u003cspan\u003eAs the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia \u003c\/span\u003e\u003cspan\u003eOIII\u003c\/span\u003e\u003cspan\u003e 3nm Pro filter\u003c\/span\u003e\u003cspan\u003es\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eare\u003c\/span\u003e\u003cspan\u003e designed to deliver \u003c\/span\u003e\u003cspan\u003e85\u003c\/span\u003e\u003cspan\u003e% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eshift\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003cspan\u003e We guarantee T\u0026gt;\u003c\/span\u003e\u003cspan\u003e85\u003c\/span\u003e\u003cspan\u003e% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems. \u003c\/span\u003e\u003cspan\u003eB\u003c\/span\u003e\u003cspan\u003elue\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eshift data shows that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eloss in emission signal and meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan\u003e5\u003c\/span\u003e\u003cspan\u003e (0.\u003c\/span\u003e\u003cspan\u003e00\u003c\/span\u003e\u003cspan\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan\u003eSNR(\u003c\/span\u003e\u003cspan\u003esignal to noise ratio\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003cspan\u003e and effective cut\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eoff rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eImproved sharp cut\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eoff astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eApplication and Performance:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh transmittance and smallest bandwidth\u003c\/span\u003e\u003cspan\u003e to maximize\u003c\/span\u003e\u003cspan\u003e contrast\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eNarrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eExtend\u003c\/span\u003e\u003cspan\u003es\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eimaging time when the moon is up\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAntlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan\u003edown \u003c\/span\u003e\u003cspan\u003eto F\/3\u003c\/span\u003e\u003cspan\u003e systems\u003c\/span\u003e\u003cspan\u003e with slight loss of signal\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAll A\u003c\/span\u003e\u003cspan\u003entlia\u003c\/span\u003e\u003cspan\u003e Narrowband filters are edge blackened to \u003c\/span\u003e\u003cspan\u003eeliminate internal reflections\u003c\/span\u003e\u003cspan\u003e from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSuperior optical reliability reduces \u003c\/span\u003e\u003cspan\u003epost image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis filter is not suited to deep sky objects that do not contain OIII emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003cspan\u003e:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBasic Substrate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e optical substrate\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFilter Thickness:   \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e2mm+\/-0.05mm for \u003c\/span\u003e\u003cspan\u003e2'' \u003c\/span\u003e\u003cspan\u003emounted\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFWHM (Full width at half maximum): \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e3nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: 500.7nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePeak Transmission:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ＞85%\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBlocking: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSurface Quality: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTransmitted Wavefront: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eLambda\/4 or better.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eParallelism: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eless than 30 arcsec\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSingle \/ Non-glued substrate\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":44968070054173,"sku":"ANT-OIII-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":44968070086941,"sku":"ANT-OIII-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":44968070119709,"sku":"ANT-OIII-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":44968070152477,"sku":"ANT-OIII-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":44968070185245,"sku":"ANT-OIII-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-OIII-Pro__82794.1670360959.1280.1280.jpg?v=1684348664"},{"product_id":"antlia-3nm-narrowband-sii-pro-filter","title":"Antlia 3nm Narrowband SII Pro Filter","description":"\u003c!-- more --\u003e\u003cp\u003e\u003cspan\u003eAntlia \u003c\/span\u003e\u003cspan\u003eSII \u003c\/span\u003e\u003cspan\u003ePro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the \u003c\/span\u003e\u003cspan\u003e3nm \u003c\/span\u003e\u003cspan\u003ePro \u003c\/span\u003e\u003cspan\u003enarrowband \u003c\/span\u003e\u003cspan\u003efilters enhance contrast of emission targets by lowering the unwanted background signal. Antlia SII\u003c\/span\u003e\u003cspan\u003e 3nm Pro\u003c\/span\u003e\u003cspan\u003e filter is designed to deliver 88% transmission at the 671.6nm line\u003c\/span\u003e\u003cspan\u003e which\u003c\/span\u003e\u003cspan\u003e provides you with the maximum signal and well defined nebulae structures\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong (Center Wavelength (CWL)-shift\u003c\/span\u003e\u003cspan\u003e. \u003c\/span\u003e\u003cspan\u003eWe guarantee T\u0026gt;88% within 1nm range of the center bandwidth\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003ewhich means that the 3nm Pro narrowband filter can guarantee high transmittance for working with both long focal ratios and fast optical systems\u003c\/span\u003e\u003cspan\u003e. B\u003c\/span\u003e\u003cspan\u003elue\u003c\/span\u003e\u003cspan\u003e-\u003c\/span\u003e\u003cspan\u003eshift data show that Antlia 3nm Pro filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eand meets the requirements of fast optics like Hyperstar and RASA.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThe out of band blocking specification is rated OD\u003c\/span\u003e\u003cspan\u003e5\u003c\/span\u003e\u003cspan\u003e (0.\u003c\/span\u003e\u003cspan\u003e00\u003c\/span\u003e\u003cspan\u003e1%) which delivers an excellent \u003c\/span\u003e\u003cspan\u003eSNR(\u003c\/span\u003e\u003cspan\u003esignal to noise ratio\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003cspan\u003e and effective cut-off rate to minimize interference from other wavelengths.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eImproved\u003c\/span\u003e\u003cspan\u003e sharp cut-off\u003c\/span\u003e\u003cspan\u003e astrophotography 3nm Pro filters are designed to minimize halos around bright stars.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eApplication and Performance:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh transmittance and smallest bandwidth\u003c\/span\u003e\u003cspan\u003e to maximize\u003c\/span\u003e\u003cspan\u003e contrast\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSteep spectral profile minimizes halos around bright stars\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eA single substrate to eliminate internal reflections   \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eNarrowband Objects: SII Emission Nebulae, Planetary, Wolf-Rayet Nebulae and Supernova Remnants\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eUse in light polluted areas and dark sites\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eExtend imaging time when the moon is up\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAll Antlia narrowband Pro filters can be used \u003c\/span\u003e\u003cspan\u003edown \u003c\/span\u003e\u003cspan\u003eto F\/3 with slight loss of signal\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eAll Antlia Narrowband filters are edge blackened to eliminate internal reflections from stray light\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSuperior optical reliability reduces post image processing\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eThis filter is not suited to deep sky objects that do not contain \u003c\/span\u003e\u003cspan\u003eSII\u003c\/span\u003e\u003cspan\u003e emissions.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003cspan\u003e:\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBasic Substrate:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Schott optical substrate\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFilter Thickness： \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003emm+\/-0.05mm for Dia36mm unmounted\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFWHM (Full width at half maximum): \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e3nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: 671.6nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePeak Transmission:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ＞88%\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBlocking: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e\u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSurface Quality: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTransmitted Wavefront: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eLambda\/4 or better.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eParallelism: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eless than 30 arcsec\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSingle \/ Non-glued substrate\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eWarranty: 3-years against delamination\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":44968070218013,"sku":"ANT-SII-3NM-1.25","price":362.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":44968070250781,"sku":"ANT-SII-3NM-RD31","price":391.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":44968070283549,"sku":"ANT-SII-3NM-RD36","price":440.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":44968070316317,"sku":"ANT-SII-3NM-2","price":561.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":44968070349085,"sku":"ANT-SII-3NM-RD50","price":696.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-SII-Pro__65220.1670361127.1280.1280.jpg?v=1684348641"},{"product_id":"antlia-triband-rgb-ultra-filter","title":"Antlia Triband RGB Ultra Filter V2","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnhanced Transmission for Superior Signal-to-Noise Ratio\u003c\/li\u003e\n\u003cli\u003eAnti-Reflection Coating to Reduce Halo Effect\u003c\/li\u003e\n\u003cli\u003eOptimized for Fast Optics up to f\/2\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003c!-- Title image text --\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003c!-- Main Image --\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAntlia Triband RGB Ultra Filter V2 - Overview\u003c\/h2\u003e\n\u003cimg class=\"DAV-img-banner\" alt=\"Antlia Triband RGB Ultra Filter V2\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/ANT-TRI-RGB-2__19119.1677769060.1280.1280_936x936.jpg\"\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Features Grid --\u003e\n\u003cdiv class=\"DAV-feature-grid\"\u003e\n\u003c!-- Feature Box 1 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n\u003cp\u003eSuperior imaging in challenging light conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 2 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n\u003cp\u003eDesigned for light pollution suppression for OSC and Mono cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 3 --\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eAntlia Triband RGB Ultra Filter V2 Filter\u003c\/h3\u003e\n\u003cp\u003eIt is designed for light pollution suppression for OSC and Mono cameras. The spectral design selected the most substantial information in the RGB bands, which makes Antlia Triband RGB Ultra Filter possible to shoot over 90% of deep sky objects, in addition to its excellent performance on emission nebula, different from other ultra-narrowband filters, it is able to capture galaxies, reflection nebulae, and star clusters from a Bortle 8 location to Bortle 1 while presenting more balanced RGB colors in your images. Also, it has a broad bandpass designed to cope with faster optics up to the f\/2 focal ratio. \u003cbr\u003eThe quantum efficiency of the B channel in current CMOS sensors is often significantly lower than that of R and G channels. Antlia team was to provide a filter with a more realistic color balance for astrophotography from light polluted locations. The problem with the low blue wavelength efficiency becomes apparent when imaging reflection nebulae and blue stars. In CMOS sensors, the blue wavelengths also contain contribution from the stronger green spectrum, thereby affecting the balance of the blue colours. Many popular imaging objects contain reflection nebula with faint blue hues such the central part ofNGC2264. Therefore, we designed Antlia Triband RGB Ultra Filter that not only retains the HSO emission signal but alsoincreases the amount of Luminous flux of the blue B channel. By improving the blue wavelength transmission, the color of thephoto is better balanced and easier to manage in post processing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cimg alt=\"Sii\u0026amp;Hb\" src=\"https:\/\/davidastro.com\/cdn\/shop\/products\/ANT-TRI-RGB-2__19119.1677769060.1280.1280_936x936.jpg\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h2\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.5mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e92% (Ha), 92% (Sii), 92% (Oiii), 92% (Nii)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e≥ OD4 (300-1100nm)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eRing Design\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUltra-thin and black anodized to minimize reflections\u003c\/p\u003e\n\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\u003cimg class=\"DAV-img-box\" alt=\"HaOIII\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAntlia Triband RGB Ultra Filter V2 Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":44968075231517,"sku":"ANT-TRIBAND-V2","price":254.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/ANT-TRI-RGB-2__19119.1677769060.1280.1280.jpg?v=1684348732"},{"product_id":"antlia-4-5nm-narrowband-h-alpha-edge-filter","title":"Antlia 4.5nm Narrowband H-alpha Edge Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003eAntlia H-alpha EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro series has been incorporated into the 4.5nm EDGE narrowband filters. The result is that these filters deliver superior SNR(signal to noise ratio) and better contrast in your images.\u003c\/p\u003e\n\u003cp\u003eAntlia H-alpha 4.5nm EGDE filters are designed to deliver high transmittance at the 656.3nm line that provides you with the maximum signal to reveal the faintest H-alpha nebulae structures.\u003c\/p\u003e\n\u003cp\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;90% within 1nm range of the center bandwidth, which means that the H-alpha 4.5nm EDGE narrowband filters can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 4.5nm EDGE filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal and meets the requirements of fast optics.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApplication and Performance:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHigh transmittance and narrow bandwidth to maximize contrast\u003c\/p\u003e\n\u003cp\u003eSteep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp\u003eA single substrate to eliminate internal reflections\u003c\/p\u003e\n\u003cp\u003eNarrowband Objects: H-alpha Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp\u003eUse in light polluted areas and dark sites\u003c\/p\u003e\n\u003cp\u003eExtends imaging time when the moon is up\u003c\/p\u003e\n\u003cp\u003eAntlia narrowband EDGE filters can be used down to f\/3 systems with minimal loss of signal\u003c\/p\u003e\n\u003cp\u003eAll Antlia unmounted filters are edge blackened to eliminate internal reflections from stray light\u003c\/p\u003e\n\u003cp\u003eSuperior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp\u003eThis filter is only effective for deep sky objects that contain H-alpha emissions\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003eFilter Thickness: 2mm+\/-0.05mm for 1.25”\u003c\/p\u003e\n\u003cp\u003eFWHM (Full width at half maximum): 4.5nm\u003c\/p\u003e\n\u003cp\u003eCWL (Central Wavelength): 656.3nm\u003c\/p\u003e\n\u003cp\u003ePeak Transmission:＞90% Blocking: \u0026gt; 5 OD (out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003eTransmitted Wavefront: Lambda\/4 or better. Parallelism: less than 30 arcsec\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":45077796815133,"sku":"ANT-HA-4.5NM-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":45077796847901,"sku":"ANT-HA-4.5NM-RD31","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":45077796880669,"sku":"ANT-HA-4.5NM-RD36","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":45077796913437,"sku":"ANT-HA-4.5NM-2","price":412.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":45077796946205,"sku":"ANT-HA-4.5NM-RD50","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-4-5nm-H-alpha-Edge-Filter.jpg?v=1685809394"},{"product_id":"antlia-4-5nm-narrowband-oiii-edge-filter","title":"Antlia 4.5nm Narrowband OIII Edge Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003eAntlia OIII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro series has been incorporated into the 4.5nm EDGE narrowband filters. The result is that these filters deliver superior SNR(signal to noise ratio) and better contrast in your images. Antlia OIII 4.5nm EDGE filters are designed to deliver 85% transmission at the 500.7nm line that provides you with the maximum signal to reveal the faintest OIII nebulae structures.\u003c\/p\u003e\n\u003cp\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;85% within 1nm range of the center bandwidth, which means that the OIII 4.5nm EDGE narrowband filters can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 4.5nm EDGE filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal and meets the requirements of fast optics.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApplication and Performance: \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHigh transmittance and narrow bandwidth to maximize contrast\u003c\/p\u003e\n\u003cp\u003eSteep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp\u003eA single substrate to eliminate internal reflections\u003c\/p\u003e\n\u003cp\u003eNarrowband Objects: OIII Emission Nebulae, Planetary, Wolf Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp\u003eUse in light polluted areas and dark sites Extends imaging time when the moon is up\u003c\/p\u003e\n\u003cp\u003eAntlia narrowband EDGE filters can be used down to f\/3 systems with minimal loss of signal\u003c\/p\u003e\n\u003cp\u003eAll Antlia unmounted filters are edge blackened to eliminate internal reflections from stray light Superior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp\u003eThis filter is only effective for deep sky objects that contain OIII emissions\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Specifications: \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003eFilter Thickness: 2mm+\/-0.05mm for 1.25''\u003c\/p\u003e\n\u003cp\u003eFWHM (Full width at half maximum): 4.5nm\u003c\/p\u003e\n\u003cp\u003eCWL (Central Wavelength): 500.7nm\u003c\/p\u003e\n\u003cp\u003ePeak Transmission: \u0026gt;85% Blocking: \u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003eTransmitted Wavefront: Lambda\/4 or better. Parallelism: less than 30 arcsec\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":45077801632029,"sku":"ANT-OIII-4.5NM-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":45077801664797,"sku":"ANT-OIII-4.5NM-RD31","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":45077801697565,"sku":"ANT-OIII-4.5NM-RD36","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":45077801730333,"sku":"ANT-OIII-4.5NM-2","price":412.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":45077801763101,"sku":"ANT-OIII-4.5NM-RD50","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-4-5nm-OIII-Edge-Filter.jpg?v=1685809944"},{"product_id":"antlia-4-5nm-narrowband-sii-edge-filter","title":"Antlia 4.5nm Narrowband SII Edge Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003eAntlia SII EDGE narrowband filter optimizes the FWHM (full width half maximum) to 4.5nm bandpass. The suppression of optical density (OD)5 on unwanted wavelengths and the excellent transmittance characteristics found in the Antlia 3nm Pro series has been incorporated into the 4.5nm EDGE narrowband filters. The result is that these filters deliver superior SNR(signal to noise ratio) and better contrast in your images.\u003c\/p\u003e\n\u003cp\u003eAntlia SII 4.5nm EGDE filters are designed to deliver high transmittance at the 671.6nm line that provides you with the maximum signal to reveal the faintest SII nebulae structures.\u003c\/p\u003e\n\u003cp\u003eConventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T\u0026gt;90% within 1nm range of the center bandwidth, which means that the SII 4.5nm EDGE narrowband filters can guarantee high transmittance for working with both long focal ratios and fast optical systems. Blue-shift data shows that Antlia 4.5nm EDGE filters can be used with nearly all systems as fast as f\/3 with minimal loss in emission signal and meets the requirements of fast optics.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eApplication and Performance:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eHigh transmittance and narrow bandwidth to maximize contrast\u003c\/p\u003e\n\u003cp\u003eSteep spectral profile minimizes halos around bright stars\u003c\/p\u003e\n\u003cp\u003eA single substrate to eliminate internal reflections\u003c\/p\u003e\n\u003cp\u003eNarrowband Objects: SII Emission Nebulae, Planetary, Wolf-Rayet Nebulae and Supernova Remnants\u003c\/p\u003e\n\u003cp\u003eUse in light polluted areas and dark sites Extend imaging time when the moon is up\u003c\/p\u003e\n\u003cp\u003eAntlia narrowband EDGE filters can be used down to f\/3 systems with minimal loss of signal\u003c\/p\u003e\n\u003cp\u003eAll Antlia unmounted filters are edge blackened to eliminate internal reflections from stray light\u003c\/p\u003e\n\u003cp\u003eSuperior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp\u003eThis filter is only effective for deep sky objects that contain SII emissions\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBasic Substrate: Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003eFilter Thickness: 2mm+\/-0.05mm for 1.25”\u003c\/p\u003e\n\u003cp\u003eFWHM (Full width at half maximum): 4.5nm\u003c\/p\u003e\n\u003cp\u003eCWL (Central Wavelength): 671.6nm\u003c\/p\u003e\n\u003cp\u003ePeak Transmission: ＞90%\u003c\/p\u003e\n\u003cp\u003eBlocking: \u0026gt; 5 OD(0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003cp\u003eSurface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003eTransmitted Wavefront: Lambda\/4 or better. Parallelism: less than 30 arcsec\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":45077809692957,"sku":"ANT-SII-4.5NM-1.25","price":263.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":45077809725725,"sku":"ANT-SII-4.5NM-RD31","price":277.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":45077809758493,"sku":"ANT-SII-4.5NM-RD36","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":45077809791261,"sku":"ANT-SII-4.5NM-2","price":412.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":45077809824029,"sku":"ANT-SII-4.5NM-RD50","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-4-5nm-SII-Edge-Filter.jpg?v=1685810048"},{"product_id":"antlia-alp-t-dualband-5nm-sii-hb-filter","title":"Antlia ALP-T Dualband 5nm SII\/Hb Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003e\u003cspan\u003eThe ALP-T dual band 5nm SII\u0026amp;Hb \u003c\/span\u003e\u003cspan\u003ef\u003c\/span\u003e\u003cspan\u003eilter is a dual line-pass filter, which lets the deep red \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSulfur-II\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e line and the blue \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHydrogen-Beta\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e line through and is used with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. It is a significant addition to the popular Antlia ALP-T dual band 5nm Ha\u0026amp;OIII filter and enables false-color images and narrow-band nebula images using OSC. When capturing data with this filter, the nebulae are recorded with greater contrast against the background than without it.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe\u003c\/span\u003e\u003cspan\u003e combination of these two dual band filters allows extreme narrow-band images with OSC cameras by capturing the spectral data from 4 channels i.e. Ha\/OIII\/SII\/Hb. The spectrum of these four channels can be separated and recombined into various colour palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or creation of images in various popular false-color palettes such as \u003c\/span\u003e\u003cspan\u003eH-O-Hb, \u003c\/span\u003e\u003cspan\u003eS\u003c\/span\u003e\u003cspan\u003e-\u003c\/span\u003e\u003cspan\u003eH\u003c\/span\u003e\u003cspan\u003e-\u003c\/span\u003e\u003cspan\u003eO\u003c\/span\u003e\u003cspan\u003e,\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eH-S-OHb, H-O-O etc.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWhy design SII\u0026amp;Hb band\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003es pass\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003einstead of \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003eOIII\u0026amp;SII bands?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter is dedicated to capture H-beta and SII emission lines. We know that SII is s\u003c\/span\u003e\u003cspan\u003eingly ionized sulfur that emits light in the deep red part of the spectrum, beyond H-alpha, \u003c\/span\u003e\u003cspan\u003ebut the \u003c\/span\u003e\u003cspan\u003econtribution of H-beta to emission lines in nebulae \u003c\/span\u003e\u003cspan\u003eis frequently overlooked, even though it is t\u003c\/span\u003e\u003cspan\u003ehe second most common Hydrogen emission after the H-alpha line. \u003c\/span\u003e\u003cspan\u003eC\u003c\/span\u003e\u003cspan\u003eapturing more OIII will boost the existing signal but does not give more information. However Hb has \u003c\/span\u003e\u003cspan\u003ethe \u003c\/span\u003e\u003cspan\u003epotential to reveal structures not seen using OIII.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eThe de\u003c\/span\u003e\u003cspan\u003esign\u003c\/span\u003e\u003cspan\u003e is to capture the H-beta emission line in the certain nebulas that contain some blue spectrum, this cannot be captured by \u003c\/span\u003e\u003cspan\u003eH-alpha, SII and OIII filters\u003c\/span\u003e\u003cspan\u003e. \u003c\/span\u003e\u003cspan\u003eGreater and richer details will be captured in many nebulae images to achieve results with a superior signal-to-noise ratio. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt is generally accepted that the OIII signal is a relatively weaker contributor to nebulae images. The OIII bandpass sensitivity is an important consideration for any nebulae filter.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eMost colour cameras (OSC) use a RGGB Bayer pattern. The allocation of twice as many green pixels as compared to either red or blue pixels, enables a much-improved capture of the OIII signal.\u003c\/span\u003e\u003cspan\u003e Furthermore, \u003c\/span\u003e\u003cspan\u003ehigher OIII signal can be achieved by additional exposure using the Antlia ALP-T Ha\u0026amp;O3 filter, then isolating the GB channels, followed by synthesis of an OIII channel to add into your stack.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn the situation where you may only want to add SII to your Ha\u0026amp;OIII data, then it may be preferable to buy one SII \u003c\/span\u003e\u003cspan\u003enarrowband\u003c\/span\u003e\u003cspan\u003e filter and \u003c\/span\u003e\u003cspan\u003eachieve a cleaner SII spectral emission. However, our new filter design (SII\u0026amp;Hb) includes the H-beta emission line which provides a distinct improvement in nebulae contrast and improved feature separation in Hb areas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntlia ALP-T Dual Band 5nm Ha\u0026amp;OIII filter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Dual band filter with a very narrow passband of 5nm in OIII and H-alpha to achieve a higher signal-to-noise ratio. The resulting contrast improvement for OSC is impressive.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntlia ALP-T Dual Band 5nm SII\u0026amp;Hb filter: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eDual band filter with a very narrow pass band of 5nm H-beta and S-II. This filter is ideal for \u003c\/span\u003e\u003cspan\u003ei\u003c\/span\u003e\u003cspan\u003encreas\u003c\/span\u003e\u003cspan\u003eing\u003c\/span\u003e\u003cspan\u003e contrast of nebulae that \u003c\/span\u003e\u003cspan\u003eemit\u003c\/span\u003e\u003cspan\u003e in the sulfur\u003c\/span\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cspan\u003eH-beta\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003erange using OSC\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003cspan\u003e It provides additional feature separation and isolation in Hb areas.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe advanced multi-coatings on Antlia ALP-T dual band filters effectively isolates the red, Ha line, blue-green, OIII line, deep red SII and the blue H-beta lines from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that both\u003c\/span\u003e\u003cspan\u003e the\u003c\/span\u003e\u003cspan\u003e ALP-T dual band 5nm Ha\u0026amp;OIII and SII\u0026amp;Hb filter create\u003c\/span\u003e\u003cspan\u003es\u003c\/span\u003e\u003cspan\u003e a superior signal-to-noise ratio and better contrast in your OSC images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThe main features and app\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003eli\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003ecation\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePasses SII 672.4nm line and H-Beta 486.1nm line\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUltra \u003c\/span\u003e\u003cspan\u003eFWHM \u003c\/span\u003e\u003cspan\u003e5nm \u003c\/span\u003e\u003cspan\u003ea\u003c\/span\u003e\u003cspan\u003ellows for increasing in exposure time\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eRecommended to be used with ALP-T Dual Band 5nm Ha\u0026amp;OIII filter to \u003c\/span\u003e\u003cspan\u003ecreate images with better \u003c\/span\u003e\u003cspan\u003esignal\u003c\/span\u003e\u003cspan\u003e to noise and better \u003c\/span\u003e\u003cspan\u003eisolation\u003c\/span\u003e\u003cspan\u003e between the 4 channels\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths improves signal-to-noise\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExtremely steep bandpass and blackened edges \u003c\/span\u003e\u003cspan\u003eof unmounted sizes \u003c\/span\u003e\u003cspan\u003eto minimize internal reflections\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt can also be used as a narrowband filter for monochrome cameras to save imaging time\u003c\/span\u003e\u003cspan\u003e;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":45077820997917,"sku":"ANT-ALP-T-SII-HB-2","price":497.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-ALP-T-Dualband-5nm-Filter.jpg?v=1685810699"},{"product_id":"antlia-alp-t-dualband-5nm-ha-oiii-highspeed-filter","title":"Antlia ALP-T Dualband 5nm Ha\/OIII Highspeed Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003eALP-T Dual Band 5nm Highspeed Filters are further optimized to work with high-speed imaging systems by shifting slightly the passband and center wavelength. Using these highspeed filters between optics f\/2.2 and f\/3.6 shows much stronger and more contrasted in nebulae imaging compared to the standard version.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFor optics f-ratios slower than f\/3.6, the standard ALP-T Dual Band 5nm filter is highly recommended. Meanwhile, if you seek the best possible performance with any optics faster than f\/2.2, the highspeed version is the best choice.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eBut keep in mind, the blue shift data by the computer simulation indicates narrowband filter shifts its bandwidth to shorter wavelengths with faster optics than f\/2, transmission at the emission wavelength may decrease perhaps 15%-20%. Although the Antlia ALP-T highspeed filter has similar transmission rates reduction in the H-a and OIII when the filter is used on fast optics, based on current standard version users’ data, it is evident that the filter still has the high performance of increase in emission nebula contrast and minimized halo.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe highspeed version price is the same as the standard filters and double benefits for the high-speed optics users. Worth mentioning is that Antlia inspected and measured products piece by piece with one of Agilent Cary’s professional spectrophotometer, resolution\/slit width is up to 0.2nm, which make us provide highly reliable and consistent products to you.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe Antlia ALP-T dual band 5nm series filter is a dual line-pass filter that was designed to be used primarily with one-shot color (OSC) cameras such as DSLR's and astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time. The advanced multi-coatings on our ALP-T ultra dual band filter effectively isolate the red Ha and the blue-green OIII lines light from emission nebulae, with almost total suppression of optical density (OD)4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual band 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post-processing efforts to isolate faint details from the background light pollution.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplication and Performance: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned especially for fast astronomy optics, in particular f-ratios f\/2.2 to f\/3.6\u003c\/p\u003e\n\u003cp\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/p\u003e\n\u003cp\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths adds signal-to-noise\u003c\/p\u003e\n\u003cp\u003eExtremely steep bandpass edges minimize internal reflections\u003c\/p\u003e\n\u003cp\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/p\u003e\n\u003cp\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/p\u003e\n\u003cp\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/p\u003e\n\u003cp\u003eNear IR (NIR) is blocked up to 1050nm\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable border=\"1\" align=\"LEFT\" width=\"585px\" bordercolor=\"#000000\" _innercreatetable=\"true\" units=\"hasPercent\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eHydrogen-alpha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eOxygen III\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e5nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e5nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e657.8nm\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e502.2nm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cspan\u003ePeak Transmission\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"25.3%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e88%\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"24.7%\" bordercolor=\"#000000\"\u003e\u003cspan\u003e82%\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eBlocking\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\" rowspan=\"1\" valign=\"top\" bordercolor=\"#000000\"\u003e\n\u003cspan\u003e≥\u003c\/span\u003e\u003cspan\u003eOD4.5 @ 300-1050nm\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"22.6%\" bordercolor=\"#000000\"\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"top\" bordercolor=\"#000000\"\u003e\u003cspan\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFilter Ring: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e2'' (M48*0.75)\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":45077823815965,"sku":"ANT-ALP-T-HS-2","price":540.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-ALP-T-Dualband-5nm-Filter_fd3f123c-ea97-42a5-8c88-c5ee1d114943.jpg?v=1685810834"},{"product_id":"antlia-alp-t-dualband-5nm-ha-oiii-filter","title":"Antlia ALP-T Dualband 5nm Ha\/OIII Filter","description":"\u003c!-- more --\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAntlia ALP-T \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003edual band\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e 5nm\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003eHa\u0026amp;OIII\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003cspan\u003e filter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a dual line-pass filter which was designed to be used primarily with one-shot color (OSC) cameras such as DSLR's \u003c\/span\u003e\u003cspan\u003eand\u003c\/span\u003e\u003cspan\u003e astronomical OSC cameras. It can also be used as a narrowband filter for monochrome cameras to save imaging time. The advanced multi-coatings on \u003c\/span\u003e\u003cspan\u003eAntlia\u003c\/span\u003e\u003cspan\u003e ALP-T ultra dual band filter effectively isolates the red \u003c\/span\u003e\u003cspan\u003eHa\u003c\/span\u003e\u003cspan\u003e and the blue-green OIII lines light from emission nebulae, with almost total suppression of \u003c\/span\u003e\u003cspan\u003eo\u003c\/span\u003e\u003cspan\u003eptical \u003c\/span\u003e\u003cspan\u003ed\u003c\/span\u003e\u003cspan\u003eensity \u003c\/span\u003e\u003cspan\u003e(\u003c\/span\u003e\u003cspan\u003eOD\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e\u003cspan\u003e4.5 on unwanted wavelengths from light pollution, moonlight, and airglow. The result is that our ALP-T dual\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eband 5nm filter creates a superior signal-to-noise ratio and better contrast in your images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter enables the capture of the two main emission nebulae bands at the same time, whilst suppressing unwanted light pollution. It enables you to capture cleaner data and reduces the post processing efforts to isolate faint details from the background light pollution.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplication and Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eEngineered specifically for use with DSLR, CMOS, and CCD color cameras\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSuppression of \u003c\/span\u003e\u003cspan\u003eoptical density (OD)\u003c\/span\u003e\u003cspan\u003e4.5 on unwanted wavelengths adds signal-to-noise\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExtremely steep \u003c\/span\u003e\u003cspan\u003ebandpass\u003c\/span\u003e\u003cspan\u003e edges minimize internal reflections\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIdeal flat-top and moderate bandpass reducing spectrum down shifts\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIon Gun Assisted Deposition coating technology on the double-sided polished substrate\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003emaking it the most\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003econsistent and accurate light pollution suppression filter \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned to suppress artificial lighting from \u003c\/span\u003e\u003cspan\u003eBortle scale\u003c\/span\u003e\u003cspan\u003e 1 to \u003c\/span\u003e\u003cspan\u003eBortle scale\u003c\/span\u003e\u003cspan\u003e 8\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTechnical Specifications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"217\"\u003e\n\u003cp\u003e\u003cspan\u003eHydrogen-alpha\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"210\"\u003e\n\u003cp\u003e\u003cspan\u003eOxygen III\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\n\u003cp\u003e\u003cspan\u003eFWHM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"217\"\u003e\n\u003cp\u003e\u003cspan\u003e5nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"210\"\u003e\n\u003cp\u003e\u003cspan\u003e5nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\n\u003cp\u003e\u003cspan\u003eCWL (Central Wavelength)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"217\"\u003e\n\u003cp\u003e\u003cspan\u003e656.3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"210\"\u003e\n\u003cp\u003e\u003cspan\u003e500.7nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\n\u003cp\u003e\u003cspan\u003ePeak Transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"217\"\u003e\n\u003cp\u003e\u003cspan\u003e9\u003c\/span\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003e%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"top\" width=\"210\"\u003e\n\u003cp\u003e\u003cspan\u003e8\u003c\/span\u003e\u003cspan\u003e8\u003c\/span\u003e\u003cspan\u003e%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\n\u003cp\u003e\u003cspan\u003eBlocking\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"top\" width=\"426\"\u003e\n\u003cp\u003e\u003cspan\u003e≥\u003c\/span\u003e\u003cspan\u003eOD4.5 @ 300-1100nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"top\" width=\"232\"\u003e\n\u003cp\u003e\u003cspan\u003eFilter Thickness\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\" valign=\"top\" width=\"426\"\u003e\n\u003cp\u003e\u003cspan\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"2\" Mounted","offer_id":45077868478749,"sku":"ANT-ALP-T-2","price":540.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-ALP-T-Dualband-5nm-Filter_422c581a-decd-4477-8e9a-260245f0f792.jpg?v=1685811364"},{"product_id":"antlia-alp-t-filter-set","title":"Antlia ALP-T Dualband 5nm Ha\/OIII and SII\/Hb Filter Set - 2\"","description":"","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45077902983453,"sku":"ANT-ALP-T-SET","price":980.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-ALP-T-Dualband-5nm-Filter-Set.jpg?v=1685811953"},{"product_id":"antlia-ir-pass-685nm-filter-1-25","title":"Antlia IR Pass 685nm Filter - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe Antlia IR Pass 685nm filter is an absorptive filter that allows infrared light with wavelengths of more than 685nm to pass through. At these longer wavelengths, the sensitivity of the unaided eye is reduced, so it is not suitable for visual observations. The filter is highly recommended for any planetary photography. At long-wavelength spectral range the atmospheric air turbulence (seeing) has much lower impact on the sharpness. The closer to the infrared band, planetary images are less disturbed by wavefront distortions in the atmosphere (seeing), result in the sharpest and highest contrast image possible.\u003c\/p\u003e\n\u003cp\u003eBy combining a luminance image taken with the IR-Pass filter, along with RGB and U-Venus filters, overall image\u003c\/p\u003e\n\u003cp\u003esharpness is significantly enhanced and details of planets in different bands are taken.\u003c\/p\u003e\n\u003cp\u003eThe filter is also possible to image the other planets during daylight due to the dark background sky created by the 685nm IR Pass Filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSchott optical substrate\u003c\/p\u003e\n\u003cp\u003e1.25” mounted, (2mm+\/-0.05mm)\u003c\/p\u003e\n\u003cp\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003c\/p\u003e\n\u003cp\u003e30 arcsec parallelism\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1.25”( 28.5*0.6 )\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSolar Observing and imaging\u003c\/p\u003e\n\u003cp\u003eVisual observation\u003c\/p\u003e\n\u003cp\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003c\/p\u003e\n\u003cp\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45077998862621,"sku":"ANT-IR685","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-IR-Pass-685nm-Filter.jpg?v=1685814630"},{"product_id":"antlia-ir-pass-850nm-filter-1-25","title":"Antlia IR Pass 850nm Filter - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cp\u003eThe Antlia IR Pass 850nm filter is an absorptive filter that allows infrared light with wavelengths of more than 850nm to pass through. It is a supplement filter of IR Pass 685nm. At these longer wavelengths, the sensitivity of the unaided eye is reduced, so it is not suitable for visual observations. The filter is highly recommended for any planetary photography. At long-wavelength spectral range the atmospheric air turbulence (seeing) has much lower impact on the sharpness. The closer to the infrared band, planetary images are less disturbed by wavefront distortions in the atmosphere (seeing), result in the sharpest and highest contrast image possible.  \u003c\/p\u003e\n\u003cp\u003eBy combining a luminance image taken with the IR-Pass filter, along with RGB and U-Venus filters, overall image sharpness is significantly enhanced and details of planets in different bands are taken. The filter is also possible to image the other planets during daylight due to the dark background sky created by the 850nm IR Pass Filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSchott optical substrate\u003c\/p\u003e\n\u003cp\u003e1.25” mounted, (2mm+\/-0.05mm)\u003c\/p\u003e\n\u003cp\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003c\/p\u003e\n\u003cp\u003e30 arcsec parallelism\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1.25”( 28.5*0.6 )\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSolar Observing and imaging\u003c\/p\u003e\n\u003cp\u003eVisual observation\u003c\/p\u003e\n\u003cp\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS.\u003c\/p\u003e\n\u003cp\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45078000140573,"sku":"ANT-IR850","price":55.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-IR-Pass-850nm-Filter.jpg?v=1685814767"},{"product_id":"antlia-u-venus-filter-1-25","title":"Antlia U-Venus Filter - 1.25\"","description":"\u003c!-- more --\u003e\nAntlia Venus-U filter is designed for imaging the cloud structure of Venus and Jupiter with CCD cameras on a telescope. Cloud details primarily reflect in the ultraviolet band which cannot normally be imaged using broadband filters. The Venus-U filter uses the latest dielectric interference coating technology to achieve high transmission efficiency and exceptional isolation of the critical UV bandwidths. The filter effectively blocks the contrast damaging frequencies beyond 400nm which typically swamp the ultraviolet cloud details on camera sensors. Like the highest quality Antlia LRGB filters, the U-Venus filter minimizes halos around bright stars and increase the contrast.\u003cbr\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommendations in the use of this filter: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1. When U-Venus filter is used with a planetary camera, it is recommended to remove any protective UV-IR window in front of a color planetary camera because this filter may attenuate transmittance of the critical ultraviolet band that contains cloud details.\u003c\/p\u003e\n\u003cp\u003e2. The lower the frequency in the UV band, the longer will be the exposure to achieve sufficient signal in your image. The sensitivity of most sensors also decreases rapidly at shorter UV wavelengths.\u003c\/p\u003e\n\u003cp\u003e3. It should be noted that when using DSLR to shoot ultraviolet flowers, the camera needs to be specially modified to remove the infrared cut filter inside the camera.\u003c\/p\u003e\n\u003cp\u003e4. In non astronomical use, the lighting conditions may block UV transmissions e.g. the UV contents of electronic flash emission, because of a combination of lower emission at shorter wavelengths and increased absorption by the glass of the flash tube. These factors combine together to require a substantially increased exposure time (for continuous UV sources), UV intensity and ISO sensitivity as the wavelength decreases.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNon-astronomical applications：\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUse for general UV photography (flowers, health of plants,insects, forensics and medical imaging)\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eoptical substrate\u003c\/p\u003e\n\u003cp\u003eThickness: 1.25” mounted (2mm+\/-0.05mm)\u003c\/p\u003e\n\u003cp\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003c\/p\u003e\n\u003cp\u003e30 arcsec parallelism\u003c\/p\u003e\n\u003cp\u003eTave＞80%\u003c\/p\u003e\n\u003cp\u003eOD3（＞0.001）@ 200-1050nm\u003c\/p\u003e\n\u003cp\u003e2 sides Dielectric multi-coating\u003c\/p\u003e\n\u003cp\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1.25”(M28.5*0.6)\u003c\/p\u003e\n\u003cp\u003eUltra-thin filter cell to minimize vignetting by maximize possible clear aperture\u003c\/p\u003e\n\u003cp\u003eBlack Anodized Finish\u003c\/p\u003e\n\u003cp\u003eLaser Engraving No Fading\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNotes: \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e1.Using the filter for visual observations is impossible due to the eye's insensitivity to this spectral range (UV). \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e2.This filter is NOT to be used for visual observations, specifically the sun or UV light sources.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45078062792989,"sku":"ANT-UVENUS","price":283.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-U-Venus.jpg?v=1685815618"},{"product_id":"antlia-h-beta-and-oiii-visual-filter-1-25","title":"Antlia H-beta and OIII Visual Filter - 1.25\"","description":"\u003c!-- more --\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAntlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm, and H-Beta 486.1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWhen it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eMain Application and Performance:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAntlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm, it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSince human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":45328145711389,"sku":"ANT-HB-OIII-1.25","price":141.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-Hbeta-OIII-Visual-Filter.png?v=1688578775"},{"product_id":"antlia-quad-band-light-pollution-filter-2","title":"Antlia Quad Band Light Pollution Filter - 2\"","description":"\u003c!-- more --\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Antlia Quad Band Anti-Light Pollution Filter is a light suppression filter for color and monochrome cameras. It is able to shoot most deep sky objects like galaxies, reflection nebulae, emission nebula, and star clusters from a Bortle 8 location to Bortle 1 as its spectral transmission passes through visible light region, near-ultraviolet (NUV) and near-infrared (NIR) region.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAntlia Quad Band filter has a broad bandpass designed to cope with faster optics up to the f\/2 focal ratio.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eConsidering the high quantum efficiency (QE) characteristics of the latest cameras in the near-infrared region and this region is less susceptible to artificial light pollution, the Antlia Quad Band Light-Pollution Filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves image signal-to-noise ratio and contrast by capturing signals in visible bands and NIR region, while also maintaining ood color balance and being easier to manage in post-processing. \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCertain full-spectrum objects like M51, M83 possess significant signal in the near-infrared (NIR) region, you can possibly capture these deep sky objects more contrasted with the Antlia Quad Band filter under light polluted condition.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWhen using this filter with a camera that has UV\/IR cut protective glass, the visible band transmission signal is retained, but the IR cut limits your ability to capture targets with infrared signal.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTherefore, the Antlia Quad Band filter is more suitable for cameras with AR protective glass as they can capture both NIR and visible band signals.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp class=\"p\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSpectrum\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e Specifications:\u003c\/span\u003e\u003c\/strong\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" width=\"580\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eH-alpha\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"100\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eS-II\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"107\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eO-III\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"103\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eH-beta\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eNII\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWavelength\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e656.3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"100\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e671.6nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e672.4nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"107\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e495.9nm,\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e500.7nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"103\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e486.1nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e658.3nm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e654.8nm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePeak Transmission\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e＞92%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"100\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e＞92%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"107\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e＞92%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"103\" valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e＞92%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e92%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eBlocking\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"534\" valign=\"center\" colspan=\"5\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e≥OD4@ 300-1\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e050\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003enm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd valign=\"center\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFilter Thickness\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"534\" valign=\"center\" colspan=\"5\" data-mce-fragment=\"1\"\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e2mm+\/-0.05mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe main features and application:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e- Anti-Light Pollution\u003c\/p\u003e\n\u003cp\u003eThe Antlia Quad Band filter is an effective solution for reducing light pollution, as it cuts out most of the orange-yellow lights from 589nm and part of blue lights from LEDs\u003c\/p\u003e\n\u003cp\u003e- Possible to shoot over 95% of deep sky objects\u003c\/p\u003e\n\u003cp\u003e- Unique spectral design offers more possibilities for astrophotography\u003c\/p\u003e\n\u003cp\u003e- High transmittance of the main emission lines Ha\/SII\/OIII\/H-Beta in the visible region, enhances the astrophotography's high SNR and contrast;\u003c\/p\u003e\n\u003cp\u003e- Near-infrared (NIR) region transmittance\u003c\/p\u003e\n\u003cp\u003e- Passing near infrared region is for shooting deep sky objects that cannot be shot with other filters without NIR transmission\u003c\/p\u003e\n\u003cp\u003e- The broad bandpass designed to cope with faster optics up to the f\/2 focal ratio.\u003c\/p\u003e\n\u003cp\u003e- Good color balance\u003c\/p\u003e\n\u003cp\u003e- It is easier to achieve color balance by adding the short-wavelength transmission\u003c\/p\u003e\n\u003cp\u003e- Superior optical reliability reduces post image processing\u003c\/p\u003e\n\u003cp\u003e- Basic Substrate: Optical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003cp\u003e- Surface Quality: S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003cp\u003e- Transmitted Wavefront: Lambda\/4 or better.\u003c\/p\u003e\n\u003cp\u003e- Parallelism: less than 30 arcsec\u003c\/p\u003e\n\u003cp\u003e- Warranty: 3-years against delamination\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":46978718892317,"sku":"ANT-QUAD-2","price":281.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Antlia-Quad-Band.jpg?v=1699120543"},{"product_id":"antlia-alp-t-dual-band-ha-oiii-3nm-sii-hb-3-5nm-2-filter-set","title":"Antlia ALP-T Dual Band Ha\u0026OIII 3nm + SII\u0026Hb 3.5nm 2\" Filter Set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n    \u003cli\u003e\n        Precise Narrowband Filtering for Exceptional Contrast\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Enhanced Transmission for Superior Signal-to-Noise Ratio\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Anti-Reflection Coating to Reduce Halo Effect\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Optimized for Fast Optics up to f\/2\n    \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\u003eSpecifications\u003c\/li\u003e\n    \u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n    \u003cli class=\"active\"\u003e       \n        \u003cdiv\u003e\n            \u003c!-- Title image text --\u003e\n            \u003cdiv class=\"DAV-bg-light\"\u003e\n                \u003c!-- Main Image --\u003e\n                \u003cdiv class=\"DAV-section-center\"\u003e\n                    \u003ch2\u003eAntlia ALP-T Dual Band Ha\u0026amp;OIII 3nm + SII\u0026amp;Hb 3.5nm 2\" Filter Set - Overview\u003c\/h2\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Antlia ALP-T Dual Band Ha\u0026amp;OIII 3nm + SII\u0026amp;Hb 3.5nm 2inches Filter Set\" class=\"DAV-img-banner\"\u003e\n                    \u003cp\u003e\n                        The Antlia ALP-T Dual Band Filter Set is a high-performance toolset designed for astrophotographers who demand precision, contrast, and exceptional image quality. This set includes the Ha\u0026amp;OIII 3nm Filter and the SII\u0026amp;Hβ 3.5nm Filter, providing unmatched narrowband imaging capability for capturing deep-sky objects with remarkable clarity and detail.                    \n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!-- Features Grid --\u003e\n            \u003cdiv class=\"DAV-feature-grid\"\u003e\n                \u003c!-- Feature Box 1 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Superior imaging in challenging light conditions.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 2 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Suitable for capturing traditional RGB images or creating artistic false-color palettes.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 3 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003ch3\u003eEasy Integration\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Compatible with optics slower than f\/4, with high-speed versions available for faster setups.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!-- Title text image --\u003e\n            \u003cdiv class=\"DAV-bg-light DAV-section-center\"\u003e\n                \u003ch3\u003eWhy Choose the Antlia ALP-T Filter Set?\u003c\/h3\u003e\n                \u003cp\u003eCombining these filters allows astrophotographers to capture the four key emission lines (H-alpha, OIII, SII, Hβ) in unparalleled detail. The advanced multi-coating technology suppresses light pollution, moonlight, and airglow while delivering outstanding contrast and clarity. Whether you’re imaging from urban or rural locations, this filter set ensures breathtaking astrophotography results.\u003c\/p\u003e\n            \u003c\/div\u003e\n\n            \u003c!-- image text --\u003e\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003c!-- Image Section --\u003e\n                \u003cdiv class=\"DAV-section-img\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Ha\u0026amp;Oiii\"\u003e\n                \u003c\/div\u003e\n\n                \u003c!-- Text Section --\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eHa\u0026amp;OIII 3nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        This dual narrowband filter isolates the H-alpha (656.3nm) and OIII (500.7nm) emission lines, optimized for use with color cameras. With a Full Width Half Maximum (FWHM) bandwidth of 3nm, it effectively blocks unwanted wavelengths, including light pollution, moonlight, and airglow. The result is an enhanced signal-to-noise ratio and strikingly detailed nebula images.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\n\u003cb\u003ePrecise Transmission:\u003c\/b\u003e Passes H-alpha and OIII lines exclusively for improved contrast in celestial images.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eExceptional Filtering:\u003c\/b\u003e Blocks optical density (OD) 4.5 on stray wavelengths, suppressing light pollution and enhancing nebula visibility.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eIdeal for OSC Cameras:\u003c\/b\u003e Designed for color cameras, with applications in luminance filtering for monochrome cameras.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eFlat-Top Bandpass:\u003c\/b\u003e Reduces spectrum shifts for consistent imaging performance, even under varying conditions.\u003c\/li\u003e\n                    \u003c\/ul\u003e\n                    \n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!-- image text --\u003e\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003c!-- Text Section --\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        The SII\u0026amp;Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha\u0026amp;OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\n\u003cb\u003eDual Narrowband Capture:\u003c\/b\u003e Captures SII and H-beta lines simultaneously for rich spectral imaging.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eEnhanced Imaging Contrast:\u003c\/b\u003e Blocks optical density (OD) 4.5 on unwanted wavelengths, optimizing contrast even in light-polluted conditions.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eCreative Color Palettes:\u003c\/b\u003e Enables various combinations like H-O-Hβ or S-H-O for unique astrophotography.\u003c\/li\u003e\n                    \u003c\/ul\u003e        \n                \u003c\/div\u003e\n                \u003c!-- Image Section --\u003e\n                \u003cdiv class=\"DAV-section-img\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Sii\u0026amp;Hb\"\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n        \u003c\/div\u003e\n    \u003c\/li\u003e\n\n    \u003cli\u003e\n        \u003ch2\u003eHa\u0026amp;OIII 3nm Filter\u003c\/h2\u003e\n        \u003ctable class=\"DAV-specifications\"\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFWHM\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e3nm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003ePeak Transmission\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e90% (H-alpha), 82% (OIII)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eBlocking\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFilter Thickness\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e2mm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eRing Design\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eUltra-thin filter cell with M48*0.75 thread to reduce vignetting\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003c!-- Add more rows as needed --\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n\n        \u003ch2\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h2\u003e\n        \u003ctable class=\"DAV-specifications\"\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFWHM\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e3.5mm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003ePeak Transmission\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e90% (SII), 85% (Hβ)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eBlocking\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eRing Design\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eUltra-thin and black anodized to minimize reflections\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003c!-- Add more rows as needed --\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/li\u003e\n    \n    \u003cli\u003e\n        \u003cul class=\"DAV-grid\"\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"HaOIII\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eHa\u0026amp;OIII Filter\u003c\/p\u003e\n                    \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/li\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"SiiHb\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eSii\u0026amp;Hb Filter\u003c\/p\u003e\n                    \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/li\u003e\n            \u003c!-- Add more items as needed --\u003e\n        \u003c\/ul\u003e          \n    \u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"Default Title","offer_id":49428759281949,"sku":"ANT-ALP-T-3NM-KIT","price":1008.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"},{"product_id":"antlia-alp-t-dual-band-ha-oiii-3nm-filter","title":"Antlia ALP-T Dual Band Ha\u0026OIII 3nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n    \u003cli\u003e\n        Precise Narrowband Filtering for Exceptional Contrast\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Enhanced Transmission for Superior Signal-to-Noise Ratio\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Anti-Reflection Coating to Reduce Halo Effect\n    \u003c\/li\u003e\n    \u003cli\u003e\n        Optimized for Fast Optics up to f\/2\n    \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\u003eSpecifications\u003c\/li\u003e\n    \u003cli\u003eIn the Box\u003c\/li\u003e\n    \u003c!--\u003cli\u003eDownloads\u003c\/li\u003e--\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n    \u003cli class=\"active\"\u003e       \n        \u003cdiv\u003e\n            \u003c!-- Title image text --\u003e\n            \u003cdiv class=\"DAV-bg-light\"\u003e\n                \u003c!-- Main Image --\u003e\n                \u003cdiv class=\"DAV-section-center\"\u003e\n                    \u003ch2\u003eAntlia ALP-T Dual Band Ha\u0026amp;OIII 3nm - Overview\u003c\/h2\u003e\n        \n                    \u003cp\u003e\n                        The Antlia ALP-T Dual Band Filter Set is a high-performance toolset designed for astrophotographers who demand precision, contrast, and exceptional image quality. This set includes the Ha\u0026amp;OIII 3nm Filter and the SII\u0026amp;Hβ 3.5nm Filter, providing unmatched narrowband imaging capability for capturing deep-sky objects with remarkable clarity and detail.                    \n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!-- Features Grid --\u003e\n            \u003cdiv class=\"DAV-feature-grid\"\u003e\n                \u003c!-- Feature Box 1 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Superior imaging in challenging light conditions.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 2 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Suitable for capturing traditional RGB images or creating artistic false-color palettes.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c!-- Feature Box 3 --\u003e\n                \u003cdiv class=\"DAV-feature-box\"\u003e\n                    \u003c!--\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623174875.jpg?v=1733252057\" alt=\"Feature 3\" class=\"DAV-feature-img\"\u003e--\u003e\n                    \u003ch3\u003eEasy Integration\u003c\/h3\u003e\n                    \u003cp\u003e\n                        Compatible with optics slower than f\/4, with high-speed versions available for faster setups.\n                    \u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!--\n            \u003cdiv class=\"DAV-bg-light DAV-section-center\"\u003e\n                \u003ch3\u003eWhy Choose the Antlia ALP-T Filter Set?\u003c\/h3\u003e\n                \u003cp\u003eCombining these filters allows astrophotographers to capture the four key emission lines (H-alpha, OIII, SII, Hβ) in unparalleled detail. The advanced multi-coating technology suppresses light pollution, moonlight, and airglow while delivering outstanding contrast and clarity. Whether you’re imaging from urban or rural locations, this filter set ensures breathtaking astrophotography results.\u003c\/p\u003e\n                \u003cdiv class=\"DAV-grid-img\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Highlight 1\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Highlight 2\"\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n            --\u003e\n            \n            \u003c!-- image text --\u003e\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003c!-- Image Section --\u003e\n                \u003cdiv class=\"DAV-section-img\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Ha\u0026amp;Oiii\"\u003e\n                \u003c\/div\u003e\n\n                \u003c!-- Text Section --\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eHa\u0026amp;OIII 3nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        This dual narrowband filter isolates the H-alpha (656.3nm) and OIII (500.7nm) emission lines, optimized for use with color cameras. With a Full Width Half Maximum (FWHM) bandwidth of 3nm, it effectively blocks unwanted wavelengths, including light pollution, moonlight, and airglow. The result is an enhanced signal-to-noise ratio and strikingly detailed nebula images.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\n\u003cb\u003ePrecise Transmission:\u003c\/b\u003e Passes H-alpha and OIII lines exclusively for improved contrast in celestial images.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eExceptional Filtering:\u003c\/b\u003e Blocks optical density (OD) 4.5 on stray wavelengths, suppressing light pollution and enhancing nebula visibility.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eIdeal for OSC Cameras:\u003c\/b\u003e Designed for color cameras, with applications in luminance filtering for monochrome cameras.\u003c\/li\u003e\n                        \u003cli\u003e\n\u003cb\u003eFlat-Top Bandpass:\u003c\/b\u003e Reduces spectrum shifts for consistent imaging performance, even under varying conditions.\u003c\/li\u003e\n                    \u003c\/ul\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003c!--\n            \u003cdiv class=\"DAV-section-container\"\u003e\n                \u003cdiv class=\"DAV-section-text\"\u003e\n                    \u003ch3\u003eSII\u0026Hβ 3.5nm Filter\u003c\/h3\u003e                \n                    \u003cp\u003e\n                        The SII\u0026Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha\u0026OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.\n                    \u003c\/p\u003e\n                    \u003cul\u003e\n                        \u003cli\u003e\u003cb\u003eDual Narrowband Capture:\u003c\/b\u003e Captures SII and H-beta lines simultaneously for rich spectral imaging.\u003c\/li\u003e\n                        \u003cli\u003e\u003cb\u003eEnhanced Imaging Contrast:\u003c\/b\u003e Blocks optical density (OD) 4.5 on unwanted wavelengths, optimizing contrast even in light-polluted conditions.\u003c\/li\u003e\n                        \u003cli\u003e\u003cb\u003eCreative Color Palettes:\u003c\/b\u003e Enables various combinations like H-O-Hβ or S-H-O for unique astrophotography.\u003c\/li\u003e\n                    \u003c\/ul\u003e        \n                \u003c\/div\u003e\n                \u003cdiv class=\"DAV-section-img\"\u003e\n                    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"Sii\u0026Hb\"\u003e\n                \u003c\/div\u003e\n            \u003c\/div\u003e\n            --\u003e\n\n        \u003c\/div\u003e\n    \u003c\/li\u003e\n\n    \u003cli\u003e\n        \u003ch2\u003eHa\u0026amp;OIII 3nm Filter\u003c\/h2\u003e\n        \u003ctable class=\"DAV-specifications\"\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFWHM\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e3nm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003ePeak Transmission\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e90% (H-alpha), 82% (OIII)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eBlocking\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFilter Thickness\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e2mm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eRing Design\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eUltra-thin filter cell with M48*0.75 thread to reduce vignetting\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003c!-- Add more rows as needed --\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n        \u003c!--\n        \u003ch2\u003eSII\u0026Hβ 3.5nm Filter\u003c\/h2\u003e\n        \u003ctable class=\"DAV-specifications\"\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eFWHM\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e3.5mm\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003ePeak Transmission\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e90% (SII), 85% (Hβ)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eBlocking\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eRing Design\u003c\/p\u003e\n                    \u003c\/td\u003e\n                    \u003ctd\u003e\n                        \u003cp\u003eUltra-thin and black anodized to minimize reflections\u003c\/p\u003e\n                    \u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n        --\u003e\n    \u003c\/li\u003e\n    \n    \u003cli\u003e\n        \u003cul class=\"DAV-grid\"\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"HaOIII\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eHa\u0026amp;OIII Filter\u003c\/p\u003e\n                    \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/li\u003e\n            \u003c!--\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" alt=\"SiiHb\" class=\"DAV-img-box\"\u003e\n                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eSii\u0026Hb Filter\u003c\/p\u003e\n                    \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n                \u003c\/div\u003e\n            \u003c\/li\u003e\n            --\u003e\n        \u003c\/ul\u003e          \n    \u003c\/li\u003e\n    \u003c!--\n    \u003cli\u003e\n        \u003cul class=\"DAV-grid\"\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003ca href=\"\" target=\"_blank\"\u003e\n                    \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\"\/\u003e\u003c\/svg\u003e\n                    \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c\/a\u003e\n            \u003c\/li\u003e\n            \u003cli class=\"DAV-grid-item\"\u003e\n                \u003ca href=\"\" target=\"_blank\"\u003e\n                    \u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\/\u003e\u003c\/svg\u003e                \u003cdiv\u003e\n                    \u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n                \u003c\/div\u003e\n                \u003c\/a\u003e\n            \u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/li\u003e\n    --\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"Default Title","offer_id":49428837531933,"sku":"ANT-ALP-T-3NM-HAOIII","price":554.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"},{"product_id":"antlia-alp-t-dual-band-sii-hb-3-5nm","title":"Antlia ALP-T Dual Band SII\u0026Hβ 3.5nm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003ePrecise Narrowband Filtering for Exceptional Contrast\u003c\/li\u003e\n\u003cli\u003eEnhanced Transmission for Superior Signal-to-Noise Ratio\u003c\/li\u003e\n\u003cli\u003eAnti-Reflection Coating to Reduce Halo Effect\u003c\/li\u003e\n\u003cli\u003eOptimized for Fast Optics up to f\/2\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003c!-- Title image text --\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003c!-- Main Image --\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eAntlia ALP-T Dual Band SII\u0026amp;Hβ 3.5nm - Overview\u003c\/h2\u003e\n\u003cp\u003eThe Antlia ALP-T Dual Band Filter Set is a high-performance toolset designed for astrophotographers who demand precision, contrast, and exceptional image quality. This set includes the Ha\u0026amp;OIII 3nm Filter and the SII\u0026amp;Hβ 3.5nm Filter, providing unmatched narrowband imaging capability for capturing deep-sky objects with remarkable clarity and detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Features Grid --\u003e\n\u003cdiv class=\"DAV-feature-grid\"\u003e\n\u003c!-- Feature Box 1 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eHigh Signal-to-Noise Ratio\u003c\/h3\u003e\n\u003cp\u003eSuperior imaging in challenging light conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 2 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n\u003cp\u003eSuitable for capturing traditional RGB images or creating artistic false-color palettes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Feature Box 3 --\u003e\n\u003cdiv class=\"DAV-feature-box\"\u003e\n\u003ch3\u003eEasy Integration\u003c\/h3\u003e\n\u003cp\u003eCompatible with optics slower than f\/4, with high-speed versions available for faster setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-container\"\u003e\n\u003cdiv class=\"DAV-section-text\"\u003e\n\u003ch3\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h3\u003e\n\u003cp\u003eThe SII\u0026amp;Hβ filter captures the deep red Sulfur-II (672.4nm) and blue Hydrogen-Beta (486.1nm) emission lines, providing complementary spectral data to the Ha\u0026amp;OIII filter. It’s perfect for creating detailed narrowband images and vibrant false-color palettes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eDual Narrowband Capture:\u003c\/b\u003e Captures SII and H-beta lines simultaneously for rich spectral imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eEnhanced Imaging Contrast:\u003c\/b\u003e Blocks optical density (OD) 4.5 on unwanted wavelengths, optimizing contrast even in light-polluted conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCreative Color Palettes:\u003c\/b\u003e Enables various combinations like H-O-Hβ or S-H-O for unique astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-section-img\"\u003e\u003cimg alt=\"Sii\u0026amp;Hb\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eSII\u0026amp;Hβ 3.5nm Filter\u003c\/h2\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.5mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e90% (SII), 85% (Hβ)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e≥ OD4.5 (300-1100nm)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eRing Design\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eUltra-thin and black anodized to minimize reflections\u003c\/p\u003e\n\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\u003cimg class=\"DAV-img-box\" alt=\"HaOIII\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\" data-mce-src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_67b5496f-f728-4fd1-b82a-563e5e8c9962.webp?v=1733252057\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSII\u0026amp;Hβ Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":49428843594013,"sku":"ANT-ALP-T-3NM-SIIHB","price":511.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"},{"product_id":"antlia-ch4-methane-filter-1-25","title":"Antlia CH4 Methane Filter - 1.25\"","description":"\u003c!-- more --\u003e\u003cp\u003eAntlia methane (CH4) filter is a specialized filter that allows light in the near infrared portion of the spectrum centered at 889nm to pass through with a bandpass that is 20nm wide. This filter was developed in order to measure finer details and more contrast of the methane that is characteristic of Jupiter, Mars, Saturn and other planets.\u003cbr\u003eThe human eye is not sensitive to light beyond about 700nm hence no person can see what is transmitted by this filter, so this filter is not suitable for visual applications.\u003c\/p\u003e\n\u003cp\u003eThe Methane (CH4) filter is recommended for planetary imaging such like Mars, Jupiter, Saturn and the other planets.\u003cbr\u003eIn order to produce good results, you are likely to require relatively longer exposures times and larger aperture telescope with this filter than with other filters.\u003c\/p\u003e\n\u003cp\u003eTechnical Data:\u003cbr\u003eoptical substrate\u003cbr\u003eThickness: 1.25” (2mm+\/-0.05mm)\u003cbr\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003cbr\u003e2 sides fine-optically polished to ensure accurate 1\/4 wavefront\u003cbr\u003e30 arcsec parallelism\u003cbr\u003eCenter-Wavelength of Antlia CH4 filter: 889nm\u003cbr\u003eTave＞90% , 90% transmission at 889nm\u003cbr\u003eOD5（0.001%）@ 200-1050nm\u003cbr\u003e2 sides Multi-layers anti-reflection coating\u003cbr\u003eSingle \/ Non-glued substrate\u003c\/p\u003e\n","brand":"Antlia","offers":[{"title":"Default Title","offer_id":50257849975069,"sku":"ANT-CH4","price":236.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/ABUIABACGAAgsuPZ_AUovoD4vQIwoAY4oAY.jpg?v=1755106117"},{"product_id":"antlia-3nm-narrowband-h-alpha-pro-highspeed-filter","title":"Antlia 3nm Narrowband H-alpha Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n\u003cli\u003ePre-shifted 656.3nm H-alpha Central Wavelength for High-Speed Systems\u003c\/li\u003e\n\u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n\u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n\u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm H-Alpha Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted by 1.2nm to counteract this effect, ensuring maximum transmission at the critical 656.3nm hydrogen-alpha emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving faint nebular detail.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging emission nebulae, planetary nebulae, Wolf-Rayet nebulae, and supernova remnants in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm H-Alpha Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm H-Alpha Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. H-alpha filters designed for solar applications are significantly narrower and specifically engineered to handle the intense light from the sun. Attempting to use this deep sky astrophotography filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e657.5nm (Pre-shifted for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935097098525,"sku":"ANT-HA-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935097131293,"sku":"ANT-HA-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935097164061,"sku":"ANT-HA-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935097196829,"sku":"ANT-HA-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935097229597,"sku":"ANT-HA-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Antlia-Ha-Pro__26276.1670360748.1280.1280.jpg?v=1770824812"},{"product_id":"antlia-3nm-narrowband-oiii-pro-highspeed-filter-f-2-6-to-f-3-6","title":"Antlia 3nm Narrowband OIII Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n  \u003cli\u003ePre-shifted 500.7nm OIII Central Wavelength for High-Speed Systems\u003c\/li\u003e\n  \u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n  \u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n  \u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm OIII Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted to counteract this effect, ensuring maximum transmission at the critical 500.7nm oxygen-III emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving delicate nebular structures.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging planetary nebulae, supernova remnants, and emission nebulae rich in OIII signal in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm OIII Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm OIII Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. OIII filters designed for deep sky applications are not engineered to handle the intense light from the sun. Attempting to use this filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePre-shifted for 500.7nm OIII (optimized for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935159292189,"sku":"ANT-OIII-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935159324957,"sku":"ANT-OIII-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935159357725,"sku":"ANT-OIII-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935159390493,"sku":"ANT-OIII-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935159423261,"sku":"ANT-OIII-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"},{"product_id":"antlia-3nm-narrowband-sii-pro-highspeed-filter-f-2-6-to-f-3-6","title":"Antlia 3nm Narrowband SII Pro Highspeed Filter - f\/2.6 to f\/3.6","description":"\u003cul\u003e\n  \u003cli\u003ePre-shifted 500.7nm OIII Central Wavelength for High-Speed Systems\u003c\/li\u003e\n  \u003cli\u003eOptimized 3nm FHWM for f\/2.6–f\/3.6\u003c\/li\u003e\n  \u003cli\u003eHigh \u0026gt;90% Peak Transmission\u003c\/li\u003e\n  \u003cli\u003eEnhanced SNR for Fast Optical Systems\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\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cp\u003eIntroducing the Antlia 3nm OIII Pro Highspeed Filter, specifically engineered for ultra-fast optical systems. This enhanced version is pre-shifted to compensate for the natural blue shift that occurs in fast focal ratio telescopes. By offsetting the central wavelength toward the red end of the spectrum, the filter maintains optimal signal capture in systems operating between f\/2.6 and f\/3.6, delivering significantly improved signal-to-noise ratio compared to standard 3nm filters.\u003c\/p\u003e\n\u003cp\u003eIn high-speed imaging systems, the converging light cone increases the angle of incidence (AOI), causing interference filters to shift toward shorter wavelengths. At f\/2.6, this shift can reach up to 2.2nm. The Antlia 3nm Pro Highspeed filter is precisely pre-shifted to counteract this effect, ensuring maximum transmission at the critical 500.7nm oxygen-III emission line during real-world use. With peak transmission exceeding 90% and a true 3nm bandwidth, this filter maximizes contrast while preserving delicate nebular structures.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Shifted Spectral Design\u003c\/strong\u003e: Compensates for blue shift in fast systems, maintaining optimal signal accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Optimization\u003c\/strong\u003e: Designed specifically for focal ratios between f\/2.6 and f\/3.6 with minimal signal loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Sharp Cut-Off\u003c\/strong\u003e: Advanced coating design minimizes halos around bright stars while maintaining high contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Blocking\u003c\/strong\u003e: OD5 (0.001%) out-of-band blocking across 300–1000nm ensures excellent signal-to-noise ratio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Substrate Construction\u003c\/strong\u003e: Non-glued optical substrate eliminates internal reflections for cleaner images.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e: Ideal for imaging planetary nebulae, supernova remnants, and emission nebulae rich in OIII signal in both light-polluted and dark-sky locations. Extends productive imaging time even under moonlit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEdge Blackening\u003c\/strong\u003e: All unmounted Highspeed filters feature blackened edges to suppress stray light reflections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Precision\u003c\/strong\u003e: Manufactured with strict quality standards to reduce post-processing and enhance reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that the Antlia 3nm OIII Pro Highspeed filter is specifically optimized for fast focal ratio systems. While it can function in slower systems, it is purpose-built to deliver maximum performance in high-speed optical configurations.\u003c\/p\u003e\n\u003cp\u003eFor astrophotographers using RASA, Hyperstar, and other fast imaging platforms, the Antlia 3nm OIII Pro Highspeed Filter provides the precision engineering required to fully exploit the capabilities of modern ultra-fast telescopes.\u003c\/p\u003e\n\u003cdiv class=\"warning\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/warning-logo.svg?%0Av=1714663206\" alt=\"Disclaimer\" width=\"25px\"\u003e\n\u003cp\u003eThis filter is not suitable for solar observation or imaging. OIII filters designed for deep sky applications are not engineered to handle the intense light from the sun. Attempting to use this filter for observing or imaging the sun can result in severe damage to your equipment and pose serious risk of eye injury or blindness. Always ensure that you are using the correct type of filter for solar observation to protect both yourself and your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBasic Substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eOptical, Single \/ Non-glued substrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFilter Thickness\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e2mm+\/-0.05mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eFWHM (Full width at half maximum)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eCWL (Central Wavelength)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ePre-shifted for 500.7nm OIII (optimized for high-speed systems)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003ePeak Transmission\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt;90%\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eBlocking\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u0026gt; 5 OD (0.001% out of band blocking) @ 300-1000nm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSurface Quality\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eTransmitted Wavefront\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLambda\/4 or better.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eParallelism\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eLess than 30 arcsec\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003eSubstrate\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eSingle \/ Non-glued\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul\u003e\n\u003cli\u003eFilter\u003c\/li\u003e\n\u003cli\u003eFilter Case\u003c\/li\u003e\n\u003cli\u003eTransmission graph\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Antlia","offers":[{"title":"1.25\" Mounted","offer_id":50935297147165,"sku":"ANT-SII-3NM-HS-1.25","price":375.0,"currency_code":"CAD","in_stock":true},{"title":"31mm Unmounted","offer_id":50935297179933,"sku":"ANT-SII-3NM-HS-RD31","price":403.0,"currency_code":"CAD","in_stock":true},{"title":"36mm Unmounted","offer_id":50935297212701,"sku":"ANT-SII-3NM-HS-RD36","price":455.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":50935297245469,"sku":"ANT-SII-3NM-HS-2","price":588.0,"currency_code":"CAD","in_stock":true},{"title":"50mm Unmounted","offer_id":50935297278237,"sku":"ANT-SII-3NM-HS-RD50","price":721.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/antlia-filter-3nm-ha-oiii-antlia-alp-t-dual-band-highspeed-3nm-ha-oiii-3-5nm-sii-hb-2-mounted-filters-42550623338715_1024x_0b67e995-1011-4adb-9f12-948552797683.webp?v=1733252577"}],"url":"https:\/\/davidastro.com\/en-us\/collections\/antlia-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}