{"product_id":"refractor-apocromatico-pro-apo-ap-80-500-ed-carbon-ota-field-flattener","title":"Apochromatic refractor Pro APO AP 80\/500 ED Carbon OTA + Field Flattener","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eThe Optical System\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Omegon apo refractor is an example of an excellent optical system, mature design, and excellent mechanics. This exceptional telescope offers the user, \u003cb\u003eastrophotographer, observer, or nature lover,\u003c\/b\u003e a unique view of the sky and nature. It guarantees crystal-clear stars right up to the edge of the field of view as well as outstanding precision mechanics.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe Doublet Apochromat\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe objective of the Omegon ED Doublet Apochromat includes TrueColor glass. The \u003cb\u003etwo-lens\u003c\/b\u003e objective consists of an ideal combination of \u003cb\u003eOHARA FPL-53\u003c\/b\u003e and \u003cb\u003eS-NBM51\u003c\/b\u003e glass. These are high and low refractive index glasses, respectively, with excellent transmittance. A very special feature is the use of S-NBM51 glass, generally used in apochromatic constructions of fluorescence microscopes. Its advantage: the optical system renders objects with \u003cb\u003eexcellent contrast and outstanding sharpness\u003c\/b\u003e. The fine details it reveals when observing planets cannot be reproduced, for example, by any Schmidt-Cassegrain type telescope.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe advantages of the carbon tube:\u003c\/b\u003e Carbon telescope tubes are particularly lightweight and therefore perfect for small mounts. Carbon has inherent stability and durability. It also exhibits very low thermal expansion. This is very useful for astrophotographers, as the focus position remains stable throughout the night.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe Eyepiece Focuser\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe telescope is equipped with a \u003cb\u003eCrayford\u003c\/b\u003e type focuser. It belongs to a new generation of patent-pending telescope tubes. The essential advantages of this telescope tube are \u003cb\u003eabsolute precision\u003c\/b\u003e and \u003cb\u003eenormous stability.\u003c\/b\u003e It can even support accessories weighing up to 10kg, thanks to an \u003cb\u003eadditional locking screw\u003c\/b\u003e. Even under great force, the telescope tube does not shift a millimeter. Once you have found the focus, it will not change even if the telescope's position relative to the sky changes.\u003c\/p\u003e\n\u003cp\u003eThe \u003cb\u003e1 to 11\u003c\/b\u003e reduction serves as a fine-tuning tool and allows for a much more accurate adjustment than most telescopes. Are you already an astrophotography enthusiast with a full-frame camera or do you want to be one in the future? Even when using a full-frame camera, you will get \u003cb\u003evignetting-free representations\u003c\/b\u003e. You can \u003cb\u003erotate\u003c\/b\u003e the entire eyepiece focuser tube; you just have to loosen the locking screw, and you have 360° of freedom.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eIncluding carrying case\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied carrying case is the ideal place to store valuable optical instruments. \u003cb\u003eUltra-robust, with sleeves and metal armor\u003c\/b\u003e, it withstands many shocks without causing problems. Its interior is filled with sponge material with the exact shape of the tube for safe storage.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThe advantages at a glance:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMultiple bonuses on all optical surfaces\u003c\/li\u003e\n\u003cli\u003eSophisticated aperture system to suppress reflections\u003c\/li\u003e\n\u003cli\u003eCrystal clear star representation and excellent contrasts\u003c\/li\u003e\n\u003cli\u003eLightweight and durable: carbon tube\u003c\/li\u003e\n\u003cli\u003eCarbon moisture protection cap with felt lining\u003c\/li\u003e\n\u003cli\u003eSensitive focusing: eyepiece focuser tube with 1:11 reduction factor and protective cap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eED-Apo doublet with 80mm aperture and 500mm focal length\u003c\/li\u003e\n\u003cli\u003e2'' eyepiece focuser with 360° rotation area\u003c\/li\u003e\n\u003cli\u003eExtended length 46cm, retracted length 39cm\u003c\/li\u003e\n\u003cli\u003eOTA weight only 2.8 kg, complete weight including case 6 kg\u003c\/li\u003e\n\u003cli\u003eExternal case dimensions 56x20x32cm\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eOmegon Field Flattener Lens - Perfectly Flat Fields for Great Astrophotos\u003c\/b\u003e\u003cbr\u003eImages obtained with many telescopes, whether refractors or reflectors, suffer from field curvature. The image appears slightly bowed, and stars at the edges do not shine or appear as sharp as those in the center. Unfocused discs appear. However, the Omegon Field Flattener lens can, as if by magic, create flat photographs with pinpoint stars right up to the outer edges of the visual field.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEasily Solved Problem\u003c\/b\u003e\u003cbr\u003eField curvature is an image distortion that goes unnoticed in visual observation and photography with small chips. It becomes noticeable when taking snapshots with large chip or full-frame cameras. There is always the option to crop photos and leave out the edges, but it's not worth investing so much money in a good camera for that. This lens elegantly solves the problem.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFlatness across the entire field of view\u003c\/b\u003e\u003cbr\u003eThe field of view remains completely flat, and the focal length of the equipment is maintained.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFor use with f\/4 to f\/8 telescopes\u003c\/b\u003e\u003cbr\u003eIt can be used with any refractor with an aperture ratio between f\/4 and f\/8.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eM48 thread for greater brightness\u003c\/b\u003e\u003cbr\u003eIt has an M48 thread on each side. This type of thread does not limit the amount of incident light as T2 or M42 do in 2\" telescopes. With the M48, you enjoy the full luminous beam.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOther accessories: 109 mm Backfocus\u003c\/b\u003e\u003cbr\u003eTo use this lens, there must be a distance of 109 mm between the lens plane and the camera chip. This distance is called \u003ci\u003ebackfocus\u003c\/i\u003e. In this space, other accessories such as a filter wheel or an OAG can be attached, and if there is still space, there are always Omegon extension rings of different lengths. Whether or not you are going to take advantage of this to introduce accessories, please take into account the recommendation of our experts on the use of adapters.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAll advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlat field of view in refractors\u003c\/li\u003e\n\u003cli\u003eCompatible with f\/4 to f\/8 telescopes\u003c\/li\u003e\n\u003cli\u003eM48 thread for greater brightness in 2\"\u003c\/li\u003e\n\u003cli\u003eBackfocus from 108 mm, depending on the telescope's focal length. At 500 mm → 118 mm, at 600 mm → 113 mm\u003c\/li\u003e\n\u003cli\u003eMultilayer coating on all optical surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":53581584531799,"sku":"48955","price":983.47,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/14738_1.jpg?v=1779016002","url":"https:\/\/astrotelescopios.com\/en-efta\/products\/refractor-apocromatico-pro-apo-ap-80-500-ed-carbon-ota-field-flattener","provider":"Astro Telescopios","version":"1.0","type":"link"}