{"product_id":"carbon-full-tube-ritchey-chretien-pro-rc-250-2000-ota","title":"Carbon Full Tube Ritchey-Chretien Pro RC 250\/2000 OTA","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eNext Night, Next Level: Omegon RC Telescope for Astrophotographers\u003c\/b\u003e\u003cbr\u003eAre you looking for a good telescope for astrophotography? With Omegon Ritchey-Chrétien telescopes, your astrophotos will reach the next level of quality. Omegon RC telescopes offer a wide field of view free of coma, so you can enjoy perfectly round stars even at the edge of the image. Discover why RC telescopes are the perfect solution for astrophotographers and the first choice for professionals.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSummary of advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHyperbolic mirrors: extremely sharp images and wide field of view without correctors\u003c\/li\u003e\n\u003cli\u003eQuartz mirrors: greater focus stability without the need for readjustment\u003c\/li\u003e\n\u003cli\u003eHigh reflectivity: dielectric coating with 92-94% reflection for clear, high-contrast observations and astrophotos\u003c\/li\u003e\n\u003cli\u003eFast cooling thanks to the open design\u003c\/li\u003e\n\u003cli\u003eElectric fan for even more immediate cooling (10\" version only)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eHyperbolic mirror for better image quality\u003c\/b\u003e\u003cbr\u003eRC telescopes are equipped with hyperbolic primary and secondary mirrors. Not spherical mirrors, like Schmidt-Cassegrain systems.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eThis great idea offers an advantage:\u003c\/b\u003e you will get better, sharper astrophotos in a wider usable field of view! Ultra-sharpness is guaranteed with APS-C sensors, even without a corrector. This technology was barely affordable until a few years ago. But now, Omegon's new RC telescopes are within reach of any astronomy enthusiast.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePhotos without corrector\u003c\/b\u003e\u003cbr\u003eUse your astronomical camera or DSLR directly with your telescope. You no longer need a corrector to get perfectly round, coma-free star photos, even at the edges. 6\" RCs are compatible with APS-C format sensors, such as those in Canon EOS or similar. In 8 and 10\" models, you can even use 24x36 mm FullFrame sensors without a corrector. In addition, you can also use professional DSLR cameras and countless astronomical cameras. And if you want to take photos in medium format, do not hesitate to ask us about the appropriate resolution.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eQuartz primary mirror\u003c\/b\u003e\u003cbr\u003eIf you have experience in astrophotography, you have probably experienced the focus shifting during long exposure shots. It's very annoying! The advantage of this model is that it has 2 quartz mirrors. It barely undergoes thermal expansion, so it produces fantastic images and maintains focus all night long.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSteel tube for greater focus stability and contrast\u003c\/b\u003e\u003cbr\u003eApart from the quality of the mirror, the steel tube also plays a fundamental role in taking good astrophotos. Compared to the aluminum tube, this Omegon RC reduces blurring by 50%. In addition, strategically placed scattered light baffles help to increase contrast.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLarge unobstructed aperture: 3\" focuser\u003c\/b\u003e\u003cbr\u003eThe rear end is extremely important. A linear 3\" Crayford focuser with ball bearings ensures enough space to illuminate even the widest fields of view without vignetting. This hybrid between Crayford and rail combines the simplicity of Crayford focusers and the stability of a good rack-and-pinion focuser.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlways perfect alignment with your observation target: fully rotatable focuser\u003c\/li\u003e\n\u003cli\u003e2\" and 1.25\" adapters with integrated compression ring\u003c\/li\u003e\n\u003cli\u003ePrecision focusing: 1:10 reduction for minimal focus adjustment\u003c\/li\u003e\n\u003cli\u003eGraduated scale: for quick focus recall\u003c\/li\u003e\n\u003cli\u003eHigh stability: camera support on the optical axis without tilting for a sharp image\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eBetter image quality than with SC telescopes\u003c\/b\u003e\u003cbr\u003eRC telescopes are essentially completely different from SC or Maksutov telescopes. They are open systems without a corrector plate that adjust to ambient temperature much faster than SC telescopes. In addition, without a plate at the front, these telescopes capture clearer images without the risk of reflections. Ritchey-Chrétien systems are the most highly corrected double-mirror telescopes available. The sharpness of the field of view, including the edges, is impressive. So it's no wonder that practically all large research telescopes in professional observatories use this type of optical tube.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAnd now within everyone's reach\u003c\/b\u003e\u003cbr\u003eThe manufacture of hyperbolic mirrors is a science and an art. Until a few years ago, RC telescopes were among the most expensive in the world and were only found in international research institutions. However, today this technology is also affordable for experienced amateur astronomers.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Omegon","offers":[{"title":"Default Title","offer_id":53581585252695,"sku":"85449","price":2990.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/85449_1.jpg?v=1779016031","url":"https:\/\/astrotelescopios.com\/en-eu\/products\/carbon-full-tube-ritchey-chretien-pro-rc-250-2000-ota","provider":"Astro Telescopios","version":"1.0","type":"link"}