{"product_id":"omegon-pro-apo-doubleed-40-180-sixtuplet-astrograph","title":"Omegon Pro APO DoubleED 40\/180 Sixtuplet Astrograph OTA","description":"\u003cdiv class=\"dcs-product-description\"\u003e\n\n\u003ch2\u003eOmegon Pro APO DoubleED 40\/180 Sixtuplet Astrograph\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOmegon Pro APO DoubleED 40\/180 Sixtuplet\u003c\/strong\u003e is an exceptionally compact wide-field astrograph designed for astrophotographers who want a highly portable imaging system without compromising optical correction.\u003c\/p\u003e\n\n\u003cp\u003eIts sophisticated six-element optical system incorporates \u003cstrong\u003etwo high-quality ED glass elements\u003c\/strong\u003e and an integrated corrector. The result is a flat, colour-corrected imaging field designed to produce crisp stars across a generous \u003cstrong\u003e44mm corrected image circle\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eWith a fast \u003cstrong\u003ef\/4.5 focal ratio\u003c\/strong\u003e and just \u003cstrong\u003e180mm focal length\u003c\/strong\u003e, this little APO is particularly well suited to large nebulae, Milky Way regions, star fields and other expansive deep-sky targets.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm aperture and 180mm focal length\u003c\/strong\u003e for ultra-wide-field astrophotography\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast f\/4.5 focal ratio\u003c\/strong\u003e ideal for efficient deep-sky imaging\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSix-element apochromatic optical design\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo premium ED glass elements\u003c\/strong\u003e for excellent chromatic correction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated field corrector\u003c\/strong\u003e – no separate flattener required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e44mm fully corrected field\u003c\/strong\u003e suitable for large imaging sensors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelical focuser\u003c\/strong\u003e for precise camera focusing\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e55mm backfocus\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eM48 camera-side connection\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotatable imaging assembly\u003c\/strong\u003e for easier framing\u003c\/li\u003e\n\u003cli\u003eCompact \u003cstrong\u003e0.8kg OTA\u003c\/strong\u003e ideal for portable imaging rigs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA.jpg?v=1787651286\" alt=\"Omegon Pro APO DoubleED 40\/180 Sixtuplet astrophotography telescope\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eSix-Element Optics for a Flat Imaging Field\u003c\/h2\u003e\n\n\u003cp\u003eDespite its remarkably small size, the Pro APO 40\/180 uses an advanced \u003cstrong\u003esixtuplet optical system\u003c\/strong\u003e. Six optical elements work together to control chromatic aberration, field curvature and other aberrations that can become particularly noticeable in wide-field astrophotography.\u003c\/p\u003e\n\n\u003cp\u003eTwo elements use ED glass to help suppress unwanted colour fringing around bright stars. Fully multi-coated optical surfaces also help minimise reflections and preserve image contrast.\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_1.jpg?v=1787651285\" alt=\"Omegon 40mm sixtuplet APO optical tube\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eBuilt for Wide-Field Astrophotography\u003c\/h2\u003e\n\n\u003cp\u003eThe combination of \u003cstrong\u003e180mm focal length and f\/4.5 optics\u003c\/strong\u003e provides a very wide field of view. This makes the telescope particularly attractive for imaging extended targets that can be difficult to frame with longer focal-length instruments.\u003c\/p\u003e\n\n\u003cp\u003eLarge emission nebulae, molecular cloud regions, expansive star fields and Milky Way structures are all natural targets for this compact astrograph.\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_2.jpg?v=1787651285\" alt=\"Omegon Pro APO 40 180 compact wide field astrograph\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eIntegrated Field Correction\u003c\/h2\u003e\n\n\u003cp\u003eThe optical corrector is built directly into the telescope. There is therefore no need to purchase, space and configure a separate field flattener.\u003c\/p\u003e\n\n\u003cp\u003eThe system provides a \u003cstrong\u003e44mm fully corrected field\u003c\/strong\u003e, making it suitable for astrophotographers using larger imaging sensors as well as smaller APS-C and dedicated astronomy cameras.\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_3.jpg?v=1787651285\" alt=\"Omegon DoubleED 40 180 astrophotography telescope detail\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eCompact Imaging Rig\u003c\/h2\u003e\n\n\u003cp\u003eAt only around \u003cstrong\u003e0.8kg\u003c\/strong\u003e and approximately \u003cstrong\u003e168mm long\u003c\/strong\u003e, the 40\/180 is extremely easy to incorporate into a portable astrophotography setup.\u003c\/p\u003e\n\n\u003cp\u003eIts low weight places relatively little demand on the mount, making it an interesting option for lightweight equatorial mounts and portable imaging systems where keeping the overall payload down is important.\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_4.jpg?v=1787651285\" alt=\"Omegon Pro APO 40mm portable astrophotography telescope\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eHelical Focuser and Camera Rotation\u003c\/h2\u003e\n\n\u003cp\u003eThe telescope uses a \u003cstrong\u003ehelical focusing system\u003c\/strong\u003e designed for precise camera focusing while keeping the optical system compact.\u003c\/p\u003e\n\n\u003cp\u003eA rotatable connection allows the camera orientation to be adjusted without disturbing the telescope position, making it much easier to frame elongated nebulae and other wide-field targets exactly as required.\u003c\/p\u003e\n\n\u003cp\u003eThe telescope provides an \u003cstrong\u003eM48 connection\u003c\/strong\u003e and a specified \u003cstrong\u003e55mm backfocus\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_5.jpg?v=1787651285\" alt=\"Omegon 40 180 APO helical focuser and camera connection\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003ch3\u003eOptics\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRefractor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptical Design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApochromat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e180mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ef\/4.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLens Design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSixtuplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFully Corrected Field\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResolving Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.45 arcsec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimiting Magnitude\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9.8 mag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLight Gathering Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Useful Magnification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80×\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.8kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e168mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFocuser\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHelical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnecting Thread\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackfocus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRotatable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eMounting\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOTA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMount Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrism Rail\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinder Base\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVixen\/Sky-Watcher style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIncluded Equipment\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eIntegrated optical corrector\u003c\/li\u003e\n\u003cli\u003eDew shield\u003c\/li\u003e\n\u003cli\u003eVixen-style prism rail\u003c\/li\u003e\n\u003cli\u003eTube clamps\u003c\/li\u003e\n\u003cli\u003eVixen\/Sky-Watcher style finder base\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_6.jpg?v=1787651284\" alt=\"Omegon Pro APO DoubleED 40 180 telescope accessories\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003ch2\u003eRecommended Use\u003c\/h2\u003e\n\n\u003cp\u003eThe Omegon Pro APO DoubleED 40\/180 is primarily designed as an \u003cstrong\u003eastrophotography instrument\u003c\/strong\u003e. Its fast focal ratio, extremely short focal length and corrected 44mm field make it especially attractive for advanced imagers building a compact wide-field system.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstrophotography:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNebulae \u0026amp; galaxies:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoon \u0026amp; planets:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNature observation:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolar observing:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended for beginners:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended for advanced users:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_7.jpg?v=1787651284\" alt=\"Omegon Pro APO DoubleED 40 180 wide field imaging telescope\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003cp\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA_8.jpg?v=1787651285\" alt=\"Omegon 40mm f4.5 sixtuplet astrograph\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":55639528046968,"sku":"85633","price":426.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-Refractor-Pro-APO-DoubleED-AP-40-180-Sixtuplet-OTA.jpg?v=1787651286","url":"https:\/\/www.darkclearskies.co.uk\/products\/omegon-pro-apo-doubleed-40-180-sixtuplet-astrograph","provider":"Dark Clear Skies ","version":"1.0","type":"link"}