{"product_id":"omegon-pro-apo-72-400-quintuplet-astrograph","title":"Omegon Pro APO AP 72\/400 Quintuplet Flat-Field Astrograph OTA","description":"\u003cdiv class=\"dcs-product-description\"\u003e\n\n\u003ch2\u003eOmegon Pro APO AP 72\/400 – Compact Quintuplet Flat-Field Astrograph\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOmegon Pro APO AP 72\/400 Quintuplet\u003c\/strong\u003e is a compact, fast apochromatic refractor designed for high-quality wide-field astrophotography. Its sophisticated \u003cstrong\u003efive-element optical system\u003c\/strong\u003e incorporates two ED glass elements together with an integrated two-element field corrector, creating a highly corrected imaging system without requiring a separate field flattener.\u003c\/p\u003e\n\n\u003cp\u003eWith a \u003cstrong\u003e72mm aperture, 400mm focal length and fast f\/5.6 focal ratio\u003c\/strong\u003e, this portable Pro APO is particularly well suited to large nebulae, star fields, open clusters and other expansive deep-sky targets.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003e44mm corrected image field\u003c\/strong\u003e provides the coverage required for full-frame imaging, while the large precision focuser, 140mm back focus and 360° camera rotation make the telescope ready for a serious modern astrophotography setup.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor.jpg?v=1787646209\" alt=\"Omegon Pro APO AP 72\/400 Quintuplet apochromatic astrograph OTA\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eOmegon Pro APO 72\/400 Highlights\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e72mm five-element quintuplet APO\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo ED glass elements\u003c\/strong\u003e for excellent colour correction\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e400mm focal length\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFast f\/5.6 focal ratio\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIntegrated two-element field corrector\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e44mm corrected image field\u003c\/strong\u003e suitable for full-frame sensors\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e140mm back focus\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3-inch precision focuser with 1:10 reduction\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e360° camera rotation\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFive-Element Optics with Double ED Glass\u003c\/h2\u003e\n\n\u003cp\u003eThe heart of the Omegon Pro APO 72\/400 is its advanced \u003cstrong\u003equintuplet optical system\u003c\/strong\u003e. Five lens elements work together, with two manufactured from carefully selected ED glass to minimise chromatic aberration and maintain accurate colour reproduction.\u003c\/p\u003e\n\n\u003cp\u003eThis sophisticated optical design helps produce clean, high-contrast stellar images with tightly controlled colour around bright stars.\u003c\/p\u003e\n\n\u003cp\u003eAll lens surfaces are multi-coated to reduce unwanted reflections and improve useful light transmission, helping the telescope deliver the contrast and clarity demanded by astrophotography.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_1.jpg?v=1787646209\" alt=\"Omegon Pro APO 72\/400 quintuplet ED apochromatic refractor optics\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eIntegrated Corrector and 44mm Flat Field\u003c\/h2\u003e\n\n\u003cp\u003eRather than requiring an additional external field flattener, the 72\/400 incorporates a \u003cstrong\u003etwo-element corrector directly into its five-element optical design\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe result is a flat and well-illuminated imaging field extending to approximately \u003cstrong\u003e44mm\u003c\/strong\u003e, making the telescope suitable for full-frame astronomy cameras as well as APS-C and smaller sensors.\u003c\/p\u003e\n\n\u003cp\u003eAn integrated corrector also simplifies the imaging train. There is no separate flattener to purchase or configure, giving you a cleaner and more straightforward route from telescope to camera.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_2.jpg?v=1787646209\" alt=\"Omegon Pro APO 72\/400 flat-field quintuplet astrograph\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFast f\/5.6 Performance for Deep-Sky Imaging\u003c\/h2\u003e\n\n\u003cp\u003eWith just \u003cstrong\u003e400mm focal length at f\/5.6\u003c\/strong\u003e, the Omegon Pro APO 72\/400 is particularly attractive for wide-field deep-sky astrophotography.\u003c\/p\u003e\n\n\u003cp\u003eThe relatively fast focal ratio allows imaging data to be gathered efficiently, while the short focal length provides a generous field of view for larger astronomical targets.\u003c\/p\u003e\n\n\u003cp\u003eIt is an excellent choice for imaging targets such as large emission nebulae, dark nebula complexes, open clusters, extensive Milky Way star fields and wide-field mosaics.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_3.jpg?v=1787646210\" alt=\"Omegon 72\/400 f5.6 wide field astrophotography telescope\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eLarge 3-Inch Precision Focuser\u003c\/h2\u003e\n\n\u003cp\u003eFull-frame cameras and modern imaging trains require a focuser with sufficient clear aperture and mechanical stability. The Omegon Pro APO 72\/400 is equipped with a substantial \u003cstrong\u003e3-inch geared rack focuser\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003e1:10 fine-focus reduction\u003c\/strong\u003e provides the precise adjustment required when reaching critical focus with high-resolution astronomy cameras.\u003c\/p\u003e\n\n\u003cp\u003eThe focuser combines smooth operation with the stability needed for demanding imaging equipment, while its generous aperture helps minimise unwanted restriction of the optical path.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_4.jpg?v=1787646209\" alt=\"Omegon Pro APO 72\/400 3 inch precision astrophotography focuser\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e140mm Back Focus for Flexible Imaging Rigs\u003c\/h2\u003e\n\n\u003cp\u003eThe telescope provides a generous \u003cstrong\u003e140mm of back focus\u003c\/strong\u003e, giving astrophotographers considerable flexibility when assembling an imaging train.\u003c\/p\u003e\n\n\u003cp\u003eThis space can be particularly useful when incorporating equipment such as filter wheels, off-axis guiders, camera adapters and cooled astronomy cameras.\u003c\/p\u003e\n\n\u003cp\u003eA supplied camera adapter provides an \u003cstrong\u003eM48x0.75 male connection\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_5.jpg?v=1787646210\" alt=\"Omegon Pro APO 72\/400 astrophotography camera connection and focuser\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e360° Camera Rotation for Perfect Framing\u003c\/h2\u003e\n\n\u003cp\u003eFraming is an important part of astrophotography, particularly when capturing elongated nebulae, galaxies or planning multi-panel mosaics.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e360° rotating focuser\u003c\/strong\u003e lets you change the orientation of the camera without rotating the entire optical tube or disturbing the telescope's position on the mount.\u003c\/p\u003e\n\n\u003cp\u003eThis makes it quick and straightforward to achieve the composition you want once your target is centred and focused.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_6.jpg?v=1787646210\" alt=\"Omegon Pro APO AP 72\/400 rotating focuser and optical tube\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCNC-Machined Optical Tube\u003c\/h2\u003e\n\n\u003cp\u003eThe optics are housed inside a robust \u003cstrong\u003eCNC-machined metal optical tube\u003c\/strong\u003e. An internal anti-reflection aperture system is complemented by a dark, velvet-like lining designed to suppress stray light and help preserve image contrast.\u003c\/p\u003e\n\n\u003cp\u003eThe retractable dew shield can be extended during observing and imaging sessions, then retracted to reduce the telescope's overall size for storage and transport.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_7.jpg?v=1787646208\" alt=\"Omegon Pro APO 72\/400 CNC optical tube and retractable dew shield\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompact Enough for a Portable Imaging Rig\u003c\/h2\u003e\n\n\u003cp\u003eAt approximately \u003cstrong\u003e317mm long\u003c\/strong\u003e with a total listed weight of just \u003cstrong\u003e2.56kg\u003c\/strong\u003e, the 72\/400 combines serious imaging capability with excellent portability.\u003c\/p\u003e\n\n\u003cp\u003eThe supplied \u003cstrong\u003eVixen-style dovetail rail\u003c\/strong\u003e makes the OTA compatible with a wide range of common astronomy mounts, while a Vixen\/Sky-Watcher style finder base provides a convenient position for a compatible finder or compact guidescope.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_8.jpg?v=1787646210\" alt=\"Omegon Pro APO 72\/400 portable quintuplet telescope OTA with Vixen dovetail\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eOmegon Pro APO AP 72\/400 Specifications\u003c\/h2\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\u003eApochromatic refractor \/ astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePro APO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptical design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQuintuplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eED elements\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e72mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400mm\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\/5.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorrected image field\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e44mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorrector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIntegrated two-element corrector\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\u003e144x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLimiting magnitude\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e90mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptical coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMulti-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3-inch geared rack focuser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFine focusing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1:10 reduction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocus travel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRotating focuser\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes – 360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEyepiece connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-inch \/ M48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCamera adapter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM48x0.75 male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e317mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.56kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting 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\u003cdiv style=\"text-align:center;margin:28px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_9.jpg?v=1787646209\" alt=\"Omegon Pro APO AP 72\/400 quintuplet astrograph telescope details\" loading=\"lazy\" style=\"max-width:100%;height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eWhat's Included?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eOmegon Pro APO AP 72\/400 Quintuplet OTA\u003c\/li\u003e\n\u003cli\u003eIntegrated field corrector\u003c\/li\u003e\n\u003cli\u003eM48x0.75 camera adapter\u003c\/li\u003e\n\u003cli\u003eTube clamps\u003c\/li\u003e\n\u003cli\u003eVixen-style dovetail rail\u003c\/li\u003e\n\u003cli\u003eRetractable dew shield\u003c\/li\u003e\n\u003cli\u003e1.25-inch and 2-inch eyepiece adapters\u003c\/li\u003e\n\u003cli\u003eVixen\/Sky-Watcher style finder base\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho Is the Omegon Pro APO 72\/400 For?\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOmegon Pro APO AP 72\/400 Quintuplet\u003c\/strong\u003e is particularly suited to advanced astrophotographers looking for a genuinely portable flat-field astrograph capable of working with large imaging sensors.\u003c\/p\u003e\n\n\u003cp\u003eIts combination of a fast f\/5.6 focal ratio, double-ED quintuplet optics, integrated correction and 44mm image field makes it particularly compelling for wide-field deep-sky astrophotography.\u003c\/p\u003e\n\n\u003cp\u003eIt can also be used for visual lunar, planetary and deep-sky observation with suitable accessories, giving the telescope additional versatility outside the imaging rig.\u003c\/p\u003e\n\n\u003ch2\u003ePortable Size, Serious Imaging Performance\u003c\/h2\u003e\n\n\u003cp\u003eFor astrophotographers who want to keep their imaging system compact without sacrificing optical sophistication, the Omegon Pro APO 72\/400 offers an impressive specification: \u003cstrong\u003efive-element optics, two ED elements, integrated correction, full-frame coverage and a precision 3-inch focuser\u003c\/strong\u003e in a telescope little over 30cm long.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable from Dark Clear Skies – UK astronomy equipment specialists.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":55639459168632,"sku":"65156","price":1189.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Pro-APO-AP-72-400-Quintuplet-OTA-Apochromatic-refractor_1.jpg?v=1787646209","url":"https:\/\/www.darkclearskies.co.uk\/products\/omegon-pro-apo-72-400-quintuplet-astrograph","provider":"Dark Clear Skies ","version":"1.0","type":"link"}