{"product_id":"antlia-alp-t-dual-band-ha-oiii-3nm-sii-hb-3-5nm-2-filter-set-copy","title":"Antlia ALP-T Dual Band Ha \u0026 OIII + SII \u0026 OIII 3nm 2\" Filter Set","description":"\u003ch1\u003eAntlia ALP-T Dual Band Ha \u0026amp; OIII + SII \u0026amp; OIII 3nm 2\" Filter Set\u003c\/h1\u003e\n\u003ch2\u003eHa\u0026amp;OIII 3nm\u003c\/h2\u003e\n\u003cp\u003eThe Antlia ALP-T Dualband 3nm Ha\u0026amp;OIII Filter is a dual narrowband filter, which lets the red H-alpha (656.3nm) and the blue-green OIII (500.7nm) lines through and is primarily engineered for color cameras to assist astrophotographers taking deep sky images with superior SNR (Signal to Noise Ratio). With an FWHM half-bandwidth designed at 3nm and achieving an optical density (OD) of 4.5 on unwanted wavelengths, it works strongly in blocking light pollution, moonlight, and airglow, leading to enhanced contrast in nebulae images by effectively passing the Ha and OIII emission lines signal only.\u003c\/p\u003e\n\u003cp\u003eThe combination of these two dual band Ha\u0026amp;OIII and SII\u0026amp;H-beta 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 color palettes in your post-processing. The resulting images can be used for luminance contrast enhancement of traditional RGB-balanced images or the creation of images in various popular false-color palettes such as H-O-Hb, S-H-O, H-S-OHb, H-O-O, etc.\u003c\/p\u003e\n\u003cp\u003eThe advanced multi-coatings on Antlia ALP-T dual-band filters effectively isolate 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 the ALP-T dual band Ha\u0026amp;OIII version and SII\u0026amp;OIII version create a superior signal-to-noise ratio and better contrast in your OSC images whether used in urban or rural areas, making them excellent choices for astrophotographers aiming to capture high-quality and more detailed celestial images.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMain features and application:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePasses OIII 500.7nm and H-alpha 656.3nm lines\u003c\/li\u003e\n\u003cli\u003eCapturing of the two main emission wavebands in the red and blue-green at the same time\u003c\/li\u003e\n\u003cli\u003eUltra FWHM 3nm design allows for increasing exposure time and capturing detailed nebulae signal\u003c\/li\u003e\n\u003cli\u003eDesigned to be used primarily with color cameras to capture cleaner data or used as Luminance filter mono cameras to save imaging time\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSNR( signal-to-noise) and better isolation between the 4 channels\u003c\/li\u003e\n\u003cli\u003eSuppression of optical density (OD)4.5 on unwanted wavelengths adds signal-to-noise\u003c\/li\u003e\n\u003cli\u003eNear IR (NIR) is blocked up to 1100nm\u003c\/li\u003e\n\u003cli\u003eIdeal flat-top and moderate bandpass reducing spectrum downshifts\u003c\/li\u003e\n\u003cli\u003eRecommended to use the filter with optics f-ratios slower than f\/4 for best performance, for optics faster than f\/4, pre-shifted highspeed version is a better choice\u003c\/li\u003e\n\u003cli\u003eIon Gun Assisted Deposition of double-sided multi-layer coating technology on the double-sided polished substrate making it the most consistent and accurate light pollution suppression filter\u003c\/li\u003e\n\u003cli\u003eHalo suppression anti-reflective coating is used to minimize halo and internal reflections\u003c\/li\u003e\n\u003cli\u003eDesigned to suppress artificial lighting from Bortle scale 1 to Bortle scale 8\u003c\/li\u003e\n\u003cli\u003eBlackened edges of unmounted sizes to minimize internal reflections\u003c\/li\u003e\n\u003cli\u003eAntlia's ever-trusted coating technology makes its durability very reliable\u003c\/li\u003e\n\u003cli\u003eWhile primarily designed for use with color cameras, the filter is also highly effective with monochrome cameras to save imaging time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM: 3nm +0.6\/-0.1nm\u003c\/li\u003e\n\u003cli\u003eCWL (Central Wavelength):\n\u003cul\u003e\n\u003cli\u003eHydrogen-alpha: 656.3nm\u003c\/li\u003e\n\u003cli\u003eOxygen III: 500.7nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003ePeak Transmission:\n\u003cul\u003e\n\u003cli\u003eHydrogen-alpha: 90%\u003c\/li\u003e\n\u003cli\u003eOxygen III: 82%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eBlocking: ≥OD4.5 @ 300-1100nm\u003c\/li\u003e\n\u003cli\u003eFilter Thickness: 2mm+\/-0.05mm\u003c\/li\u003e\n\u003cli\u003eBasic Substrate Optical, Single \/ Non-glued substrate\u003c\/li\u003e\n\u003cli\u003eSurface Quality S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront Lambda\/4 or better. Parallelism less than 30 arcsec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2’’ Mounted (M48*0.75 thread)\u003c\/li\u003e\n\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximizing possible clear aperture\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eLaser Engraving, No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSII\u0026amp;OIII 3nm Filter\u003c\/h2\u003e\n\u003cp\u003eThe Antlia ALP-T Dualband 3nm SII\u0026amp;OIII Filter is a dual narrowband filter, which lets the deep-red SII and the blue-green OIII (500.7nm) lines through and is primarily engineered for color cameras to assist astrophotographers taking deep sky images with superior SNR (Signal to Noise Ratio). With an FWHM half-bandwidth designed at 3nm and achieving an optical density (OD) of 4.5 on unwanted wavelengths, it works strongly in blocking light pollution, moonlight, and airglow, leading to enhanced contrast in nebulae images by effectively passing the SII and OIII emission lines signal only.\u003c\/p\u003e\n\u003cp\u003eThe advanced multi-coatings on Antlia ALP-T dual-band filters effectively isolate the red, SII 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMore information coming soon\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM: 3nm +0.6\/-0.1nm\u003c\/li\u003e\n\u003cli\u003eFilter Thickness: 2mm+\/-0.05mm\u003c\/li\u003e\n\u003cli\u003eBasic Substrate Optical, Single \/ Non-glued substrate\u003c\/li\u003e\n\u003cli\u003eSurface Quality S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront Lambda\/4 or better. Parallelism less than 30 arcsec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2’’ Mounted (M48*0.75 thread)\u003c\/li\u003e\n\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximizing possible clear aperture\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eLaser Engraving, No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\u003cli\u003eNight visual observation\u003c\/li\u003e\n\u003cli\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eNot Permitted:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER DIRECTLY\u003c\/strong\u003e\u003cbr\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM: 3.5nm +0.5\/-0.5nm\u003c\/li\u003e\n\u003cli\u003eCWL (Central Wavelength):\n\u003cul\u003e\n\u003cli\u003eSulfur-II: 672.4nm\u003c\/li\u003e\n\u003cli\u003eHydrogen-Beta: 486.1nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003ePeak Transmission:\n\u003cul\u003e\n\u003cli\u003eSulfur-II: 90%\u003c\/li\u003e\n\u003cli\u003eHydrogen-Beta: 85%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eBlocking: ≥OD4.5 @ 300-1100nm\u003c\/li\u003e\n\u003cli\u003eFilter Thickness: 2mm+\/-0.05mm\u003c\/li\u003e\n\u003cli\u003eBasic Substrate Optical, Single \/ Non-glued substrate\u003c\/li\u003e\n\u003cli\u003eSurface Quality S\/D (scratch\/dig)= 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront Lambda\/4 or better. Parallelism less than 30 arcsec\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Ring:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2’’ Mounted (M48*0.75 thread)\u003c\/li\u003e\n\u003cli\u003eUltra-thin filter cell to minimize vignetting by maximizing possible clear aperture\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eLaser Engraving, No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot Recommended:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolar Observing and imaging\u003c\/li\u003e\n\u003cli\u003eNight visual observation\u003c\/li\u003e\n\u003cli\u003eDO NOT LOOK AT THE SUN WITH ANTLIA FILTERS. Serious eye damage will result if you fail to observe the warning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eNot Permitted:\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eDO NOT LOOK AT THE SUN WITH THIS FILTER DIRECTLY\u003c\/strong\u003e\u003cbr\u003eSerious eye damage will result if you fail to observe the warning.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAntlia ALP-T Dualband 3nm Ha\u0026amp;OIII Filter \u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" border=\"0\"\u003e\n\u003ccolgroup width=\"187\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"152\"\u003e\u003c\/colgroup\u003e \u003ccolgroup width=\"144\"\u003e\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"\"}'\u003e\u003cbr\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Hydrogen-alpha\"}'\u003eHydrogen-alpha\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Oxygen III\"}'\u003eOxygen III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"FWHM\"}'\u003eFWHM\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"3nm +0.6\\\/-0.1nm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e3nm +0.6\/-0.1nm \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"3nm +0.6\\\/-0.1nm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e3nm +0.6\/-0.1nm \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"CWL\"}'\u003eCWL\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"656.3nm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e656.3nm \u003c\/span\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"500.7nm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e500.7nm \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Peak transmission\"}'\u003ePeak transmission\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 3, \"3\": 0}' data-sheets-numberformat='{ \"1\": 2, \"2\": \"0.00%\", \"3\": 1}'\u003e90.00%\u003c\/td\u003e\n\u003ctd align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 3, \"3\": 0}' data-sheets-numberformat='{ \"1\": 2, \"2\": \"0.00%\", \"3\": 1}'\u003e90.00%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Blocking\"}'\u003eBlocking\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"≥OD4.5 @ 300-1100nm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e≥OD4.5 @ 300-1100nm \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Filter thickness\"}'\u003eFilter thickness\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"2mm+\\\/-0.05mm \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e2mm+\/-0.05mm \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Basic Substrate\"}'\u003eBasic Substrate\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Optical, Single \\\/ Non-glued substrate \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003eOptical, Single \/ Non-glued substrate \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"40\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Surface Quality\"}'\u003eSurface Quality\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"S\\\/D (scratch\\\/dig)= 60\\\/40 (Refer to MIL-O- \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003eS\/D (scratch\/dig)= 60\/40 (Refer to MIL-O- \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Transmitted Wavefront\"}'\u003eTransmitted Wavefront\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Lambda\\\/4 or better. \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003eLambda\/4 or better. \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Parallelism\"}'\u003eParallelism\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"less than 30 arcsec \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003eless than 30 arcsec \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd height=\"21\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"Filter Ring\"}'\u003eFilter Ring\u003c\/td\u003e\n\u003ctd colspan=\"2\" align=\"center\" valign=\"middle\" data-sheets-value='{ \"1\": 2, \"2\": \"2’’ (M48*0.75) \"}'\u003e\u003cspan style=\"font-family: Liberation Serif;\"\u003e2’’ (M48*0.75) \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"western\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan lang=\"en-US\"\u003e\u003cb\u003eAntlia ALP-T dualband 3.5nm SII \u0026amp; OIII Filter\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"western\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e\u003cspan style=\"font-size: small;\"\u003e\u003cspan lang=\"en-US\"\u003e\u003cb\u003e\u003cstrong\u003eMore information coming soon\u003c\/strong\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAntlia ALP-T Dualband 3nm Ha\u0026amp;OIII Filter 2''\u003c\/li\u003e\n\u003cli\u003eAntlia ALP-T Dualband 3nm SII\u0026amp;OIII Filter 2\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty \u0026amp; Manual\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eAntlia 3-Years Warranty against Delamination\u003c\/span\u003e\u003c\/p\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":46768630956261,"sku":"AF-ALP-T-2-HaOIII-SIIOIII-3nm-SET","price":1065.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/alp-t-2-haoiii-3nm-2.jpg?v=1777043671","url":"https:\/\/istronomyplus.com\/products\/antlia-alp-t-dual-band-ha-oiii-3nm-sii-hb-3-5nm-2-filter-set-copy","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}