{"title":"Antlia 4.5nm EDGE Narrowband Filters","description":"\u003cp\u003eAntlia 4.5nm EDGE narrowband filters are H-alpha, OIII and SII filters with a 4.5nm bandpass, a middle ground between the tighter Antlia 3nm Pro filters and the wider 7nm Prime filters. They block most light pollution and moonlight while collecting signal faster than the narrowest options.\u003c\/p\u003e\u003cp\u003eUsed with a monochrome astronomy camera, the three filters cover a full SHO (Hubble palette) sequence for emission nebulae and supernova remnants.\u003c\/p\u003e","products":[{"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"}],"url":"https:\/\/davidastro.com\/collections\/antlia-4-5nm-edge-narrowband-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}