{"product_id":"omegon-pro-apo-66-400-ed-ota","title":"Omegon Pro APO AP 66\/400 ED Apochromatic Refractor OTA","description":"\u003cdiv\u003e\n\n\u003ch2\u003eOmegon Pro APO AP 66\/400 ED Apochromatic Refractor\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eOmegon Pro APO AP 66\/400 ED\u003c\/strong\u003e is a compact, high-quality apochromatic refractor designed for advanced visual observers, astrophotographers and nature enthusiasts who want excellent optical performance in a highly portable package.\u003c\/p\u003e\n\n\u003cp\u003eWith a \u003cstrong\u003e66mm aperture\u003c\/strong\u003e, \u003cstrong\u003e400mm focal length\u003c\/strong\u003e and \u003cstrong\u003ef\/6.1 focal ratio\u003c\/strong\u003e, this compact ED doublet is particularly well suited to wide-field astronomy, travel imaging and terrestrial observation.\u003c\/p\u003e\n\n\u003cp\u003eA new improved \u003cstrong\u003ePower Linear focuser\u003c\/strong\u003e combines the smooth action of a Crayford design with an additional rack-and-pinion guide rail, providing the rigidity and fine control required for cameras, larger eyepieces and high-magnification observing.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center; margin:25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA_2.jpg?v=1787738502\" alt=\"Omegon Pro APO AP 66\/400 ED apochromatic refractor telescope\" style=\"max-width:100%; height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompact 66mm ED Apochromatic Optics\u003c\/h2\u003e\n\n\u003cp\u003eThe telescope uses a \u003cstrong\u003e66mm doublet ED objective\u003c\/strong\u003e designed to provide excellent colour correction and high image contrast.\u003c\/p\u003e\n\n\u003cp\u003eCompared with a conventional achromatic refractor, the ED optical system reduces visible chromatic aberration, helping stars, planets and terrestrial subjects appear cleaner and more naturally coloured.\u003c\/p\u003e\n\n\u003cp\u003eThe manufacturer specifically positions the 66\/400 ED APO as a high-quality compact instrument capable of maintaining very good colour correction even at magnifications around 100x.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center; margin:25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA_3.jpg?v=1787738502\" alt=\"Omegon 66mm ED doublet apochromatic refractor optics\" loading=\"lazy\" style=\"max-width:100%; height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e400mm Focal Length for Wide-Field Astronomy\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e400mm focal length\u003c\/strong\u003e gives the telescope a relatively wide field of view, making it particularly useful for larger star fields, open clusters, brighter nebulae and other extended celestial targets.\u003c\/p\u003e\n\n\u003cp\u003eAt \u003cstrong\u003ef\/6.1\u003c\/strong\u003e, the Pro APO 66\/400 is also well suited to astrophotography where a compact, relatively fast refractor can be advantageous.\u003c\/p\u003e\n\n\u003cp\u003eThe supplied specifications give a resolving capacity of \u003cstrong\u003e1.74 arcseconds\u003c\/strong\u003e, limiting magnitude of \u003cstrong\u003e10.9\u003c\/strong\u003e, light-gathering capacity of \u003cstrong\u003e90\u003c\/strong\u003e and maximum useful magnification of \u003cstrong\u003e130x\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center; margin:25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA.jpg?v=1787738502\" alt=\"Omegon Pro APO 66\/400 f6.1 compact travel refractor\" loading=\"lazy\" style=\"max-width:100%; height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003ePower Linear Focuser with 1:10 Fine Focus\u003c\/h2\u003e\n\n\u003cp\u003eThe improved \u003cstrong\u003ePower Linear focuser\u003c\/strong\u003e is based on the Crayford principle but also incorporates a rack-and-pinion guide rail.\u003c\/p\u003e\n\n\u003cp\u003eThis hybrid approach is designed to provide both smooth focusing and increased mechanical stability when supporting heavier accessories such as cameras, diagonal mirrors or larger eyepieces.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003e1:10 fine-focus reduction\u003c\/strong\u003e allows very small adjustments when critical focus is required, particularly useful for astrophotography and high-magnification observing.\u003c\/p\u003e\n\n\u003cp\u003eThe focuser accepts \u003cstrong\u003e2-inch accessories\u003c\/strong\u003e, and the specification also confirms that the focuser is \u003cstrong\u003erotatable\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center; margin:25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA_5.jpg?v=1787738504\" alt=\"Omegon Pro APO 66\/400 Power Linear focuser with 1 to 10 fine focus\" loading=\"lazy\" style=\"max-width:100%; height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eSuitable for Astrophotography\u003c\/h2\u003e\n\n\u003cp\u003eThe combination of compact size, ED optics, 400mm focal length and precision focuser makes the Omegon 66\/400 particularly suitable for portable astrophotography.\u003c\/p\u003e\n\n\u003cp\u003eIts short focal length is useful for imaging larger targets and star fields, while the 1:10 fine focuser provides the control needed when reaching critical camera focus.\u003c\/p\u003e\n\n\u003cp\u003eThe formal specification rates the telescope as \u003cstrong\u003every good for astrophotography\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align:center; margin:25px 0;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA_6.jpg?v=1787738503\" alt=\"Omegon Pro APO 66\/400 ED astrophotography refractor OTA\" loading=\"lazy\" style=\"max-width:100%; height:auto;\"\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eVisual Astronomy\u003c\/h2\u003e\n\n\u003cp\u003eDespite its compact dimensions, the Pro APO 66\/400 can also provide rewarding visual observations.\u003c\/p\u003e\n\n\u003cp\u003eThe Moon and brighter planets are suitable targets, while the relatively wide field of view makes the telescope particularly enjoyable for scanning rich star fields, open clusters and larger deep-sky objects.\u003c\/p\u003e\n\n\u003cp\u003eA suitable \u003cstrong\u003ediagonal and eyepiece are required for visual observing\u003c\/strong\u003e and are not listed as included with this OTA.\u003c\/p\u003e\n\n\u003ch2\u003eNature Observation and Telephoto Use\u003c\/h2\u003e\n\n\u003cp\u003eThe compact ED refractor can also be used for terrestrial nature observation. Fine details in wildlife and distant landscapes benefit from the colour correction and contrast of the ED objective.\u003c\/p\u003e\n\n\u003cp\u003eThe 400mm focal length also allows the optical tube to function as a telephoto optical system when connected to suitable photographic equipment.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003e1\/4-inch photographic connection\u003c\/strong\u003e allows the telescope to be fitted to compatible photo tripods, making it useful as a lightweight spotting or photography instrument when travelling.\u003c\/p\u003e\n\n\u003cdiv style=\"text-align\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":55640768250232,"sku":"14173","price":539.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/Omegon-Apochromatic-refractor-Pro-APO-AP-66-400-ED-OTA.jpg?v=1787738502","url":"https:\/\/www.darkclearskies.co.uk\/products\/omegon-pro-apo-66-400-ed-ota","provider":"Dark Clear Skies ","version":"1.0","type":"link"}