{"title":"Optolong H-Alpha Imaging Filters","description":"\u003cp\u003eHydrogen-alpha narrowband filters for monochrome imaging.\u003c\/p\u003e","products":[{"product_id":"optolong-h-alpha-3nm-filters","title":"Optolong H-alpha 3nm Filters","description":"\u003cdiv data-mce-fragment=\"1\" class=\"container\" data-ipvsetting='{\"autoplay\":0,\"nocookie\":0 }' id=\"product-product\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"row\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"\" id=\"content\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"product-blocks blocks-default\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"tabs-container product_extra product_tabs product_tabs-default\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"tab-content\"\u003e\n\u003cdiv data-mce-fragment=\"1\" id=\"product_tabs-2\" class=\"product_extra-331 tab-pane active\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-body expand-block\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-wrapper\"\u003e\n\u003cdiv data-mce-fragment=\"1\" class=\"block-content\"\u003e\n\u003ch1 data-mce-fragment=\"1\"\u003eOptolong H-alpha 3nm Ultra Narrow Band Deep Sky Imaging Filter 2\" for CCD\/CMOS Astro Photography\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHere below you will find a description of all three types of filters for your information as a full bundle is also available, however \u003c\/span\u003e\u003cb data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ethis product listing is only for the Optolong 3nm H-alpha filter. \u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePlease note, if you buy the full HSO bundle you will save some money in comparison to the price of the individual items.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eGeneral Product Description for All Versions\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe Optolong SHO-3nm filter kit (available separately) includes SII 3nm, H-Alpha 3nm, and OIII 3nm narrow band filters, generally working with astronomical monochrome cooling CCD and modified DSLR imaging in each single-channel. Corresponding with RGB channel (HA, OIII, SII), photographers can process Hubble images by astronomical post processing software. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe extra narrowband SIICCD3nm filter  (Sulphur II for CCD) is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe ultra narrowband OIII-CCD 3nm filter is designed for nebula observation allowing 3nm bandwidth of light centered on a wavelength of 500nm through, which corresponds to OIII emission line, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOIII emits 495.9nm and 500.7nm and it is a blue-green colored filter. Many of images of planetary nebula and supernoval remnants are taken only with H-Alpha and OIIII filters. They show great structural details, but have natural colors, looking like an RGB image.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eMain Use and Performance of the H-alpha Filter (this product listing)\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe H-Alpha 3nm filter is a popular narrowband filter allowing 3nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure vapor lights and unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e.skyglow). Better choice of narrowband H-Alpha astrophotographer filter for highest contrast and revealing subtle nebula details. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eFeatures\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eGive you higher contrast and greater detailed viewing;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eDecrease background noise and improve the contrast of the object;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIncrease the faint nebula signal and make it brighter;\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eWith a narrow band fitlers kit you are able to process a Hubble-like image (Hubble-palette);\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThrough the optimization of the substrate and upgraded coating technology.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWARNING:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOptolong filters are not designed for solar observation. DO NOT LOOK AT THE SUN WITH ANY OPTOLONG FILTER as permanent eye damage will be the result.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eTechnical Data\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSubstrate material\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGlass thickness  of 2\" version: 1.85mm;\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eGlass thickness of 36mm version: 2.0mm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFine-optically polished to ensure accurate 1\/4 wavefront and \u0026lt; 30 seconds parallelism over both surfaces\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e85-86% transmission at major OIII line at 500nm\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLight pollution emission is blocked \u0026gt;99.9%\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eFilter Cell (only for filters in a cell)\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eUltra-thin filter cell minimise vignetting by maximising possible clear aperture (clear aperture is 26mm for 1.25” size and 45mm for 2” size)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAerometal Material\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePrecise CNC Machining\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSand Blasting Process\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eExtinction Treatment to Prevent Reflection\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eLaser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eAvailable Sizes\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eStandard 2”\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRound 36mm Unmounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003ePackaging\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlastic PP Case\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eImported High Pressure EVA Case Lining\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSilver Cardboard Box\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHigh Density Sponge Carton Lining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eOptical Coating\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band. (Please note, \"planetary rotation system\" is a type of optical coating process and does not refer to the astronomical system describing the motion of the planets in our solar system.)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe Major Emission Lines of Nebulae: H-α 656.3nm, H-β486.1nm, OIII 495.9nm, OIII 500.7nm \u003cbr data-mce-fragment=\"1\"\u003eThe Major Emission Lines of Artificial Light Pollution: Hg 435.8nm, 546.1nm, 577nm, 578.1nm, Na 598nm, 589.6nm, 615.4nm, 616.1nm\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch1 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOptolong SHO-3nm Narrowband Filters Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAs we all know, OIII narrow band filters always had a problem with halos around brigth stars. Thanks to Optolongs long standing experiences with their 7nm narrow band filters, the halo of OIII 3nm filter was optimized by improving the coating technology. Here we also conducted a qualitative halo test of the bright star of the Veil Nebula, and it can be seen from the original picture that the OIII 3nm performs very well on the bright star.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTelescope：RASA 11 at f2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCamera：QHY 600\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eMount:艾顿 IOptron CEM120\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptolong OIII-3nm single 10min\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCopyright: \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eWuzhen\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/4397cdca0bb736431cb0f3d9f267cd2b.png\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eI. \u003cu data-mce-fragment=\"1\"\u003eThe Bubble Nebula (NGC 7635)  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eAstrodoc Ron Brecher \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eAcquisition, focusing, and control of Paramount MX mount with N.I.N.A., TheSkyX and PHD2. Focus with Optec DirectSync motor and controller. Equipment control with PrimaLuce Labs Eagle 4 Pro computer. All pre-processing and processing in PixInsight. Acquired from Ron‘s \u003ca data-mce-fragment=\"1\" href=\"https:\/\/skyshed.com\/\" data-mce-href=\"https:\/\/skyshed.com\/\"\u003eSkyShed\u003c\/a\u003e in Guelph. Average transparency and seeing. Data acquired Oct 18-19, 2021 under a brightly moonlit sky (Moon 12 days old)..\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSky-Watcher Esprit 150 f\/7 refractor and QHY600M camera with Optolong H-alpha, O(III) and S(II) 3nm filters – FIRST LIGHT WITH OPTOLONG 3nm BANDPASS FILTERS\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eHa: 9 x 20m = 3hr00m\u003cbr data-mce-fragment=\"1\"\u003eO3: 10 x 20m = 3hr20m\u003cbr data-mce-fragment=\"1\"\u003eS2: 9 x 20m = 3hr00m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eTotal: 9hr20m\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eImage scale 0.72 arcsec per \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003epixel \u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/14a06805527ed873c87d3906b9ff5480.jpg\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eⅡ.\u003cu data-mce-fragment=\"1\"\u003e Pacman Nebula NGC 281 in the Hubble Palette  © \u003ca data-mce-fragment=\"1\" href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\" data-mce-href=\"https:\/\/astrodoc.ca\/hubble-bubble\/?fbclid=IwAR1BN9oaT7frsUM5dOT7Nm7ZZIxhrM-huHrAqD4Psm4eY3BJLncXTwZyy98\"\u003eLuca Fornaciari Astrophotography  \u003c\/a\u003e \u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003ePacman Nebula NGC 281 in the Hubble Palette\u003cbr data-mce-fragment=\"1\"\u003eWith the bad weather persisting I have taken these last few weeks to experiment with new way in the development of narrowband shots.\u003cbr data-mce-fragment=\"1\"\u003eI'm happy because I'm defining a Hubble Palette that really feels mine, designing it a little at a time.\u003cbr data-mce-fragment=\"1\"\u003eNarrowband is creative and fun because it allows us a good deal of freedom to experiment with the integration of the individual channels and the image you see is a developing version of what I am building.\u003cbr data-mce-fragment=\"1\"\u003eThe image was obtained with the new 3nm Optolong filters. If the bad weather will allow me a few nights I will soon finish my tests on these filters, but for now the impressions are really good.\u003cbr data-mce-fragment=\"1\"\u003e240 minutes of Ha, 510 of OIII and 260 minutes of SII with the ASI 294MM and the Sky-Watcher 300 f\/4.\u003cbr data-mce-fragment=\"1\"\u003eI wish you a beautiful sunny day!\u003cbr data-mce-fragment=\"1\"\u003eSETUP:\u003cbr data-mce-fragment=\"1\"\u003eSky-Watcher 300 f \/ 4 on EQ8R-Pro\u003cbr data-mce-fragment=\"1\"\u003eZWO ASI 294MM, \u003cstrong data-mce-fragment=\"1\"\u003eOptolong Filters Ha 3nm, OIII 3nm, SII \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003e3nm\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca data-mce-fragment=\"1\" href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\" data-mce-href=\"https:\/\/www.facebook.com\/photo?fbid=317253446884697\u0026amp;set=a.294756879134354\"\u003e\u003cimg data-mce-fragment=\"1\" src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\" alt=\"\" data-mce-src=\"https:\/\/optolong.com\/uploads\/images\/20211201\/991d6920cac738a1ac8277a582bac7dd.jpg\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Optolong","offers":[{"title":"2\"","offer_id":42296265703601,"sku":null,"price":388.8,"currency_code":"GBP","in_stock":true},{"title":"36mm","offer_id":42296265736369,"sku":null,"price":329.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/optolong-h-alpha-3nm-filters-545031.webp?v=1718364480"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/optolong-hub-h-alpha.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}