{"product_id":"ota-de-truss-ligero-ritchey-chretien-pro-rc-355-2845","title":"Ritchey-Chretien Pro RC 355\/2845 Lightweight Truss OTA","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eOmegon RC Truss Carbon Telescope: quartz glass honeycomb primary mirror for faster thermal equilibrium\u003c\/b\u003e\u003cbr\u003eIs astrophotography your passion, and are you looking for the right telescope for your observatory? Richey-Chretien telescopes combine excellent mirror optics with an almost perfect image. Two hyperbolic mirrors ensure a wide, illuminated, coma-free field of view in a compact design. The result: perfect stars right to the edge. That's why countless professional observatories and institutes rely on this system.\u003c\/p\u003e\n\u003cp\u003eChoose professional technology for your own observatory too! Omegon RC telescopes are so well-balanced that they even fit into smaller observatories.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eAdvantages at a glance:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHyperbolic mirrors: extremely sharp image, large field of view without correctors\u003c\/li\u003e\n\u003cli\u003eQuartz mirrors: for stable focusing, no refocussing necessary, image remains sharp\u003c\/li\u003e\n\u003cli\u003eSuitable for large format CCD cameras: illumination of approx. 60 mm\u003c\/li\u003e\n\u003cli\u003eCarbon truss tube: system reinforced with carbon tube\u003c\/li\u003e\n\u003cli\u003eHigh reflection: 92-94% dielectric coating for bright, high-contrast astronomical observations and photographs\u003c\/li\u003e\n\u003cli\u003eFast cooling thanks to its open design\u003c\/li\u003e\n\u003cli\u003eHigh-power electric fans: minimise tubesearing and accelerate optical cooling\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 with spherical mirrors, like Schmidt-Cassegrain systems. The RC design is very carefully considered: the optical tube offers a wider field of view and considerably less optical aberration.\u003c\/p\u003e\n\u003cp\u003eImpeccable image quality in a larger field of view: this is the aim of these telescopes. That's why they are the preferred choice for astrophotography. And that's also why RC optical tubes are ideal for CCD cameras, which means you can take sharp photos right to the edge without the need for a corrector. This way you can capture beautiful snapshots of the sky.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eEspecially useful in a wider spectral region\u003c\/b\u003e\u003cbr\u003eRC telescopes do not have any lenses in the beam path. This is a great advantage, because refraction effects such as chromaticism or dispersion are avoided. The useful region of the spectrum beyond visible light is wider. So you can delve into the interesting world of ultraviolet and infrared rays with your camera.\u003c\/p\u003e\n\u003cp\u003eThe primary mirror of this RC telescope variant is made of high-quality quartz glass and has a honeycomb structure and less mass. This quickly achieves thermal equilibrium, which has a positive effect on the quality of astrophotos. An advantage for all advanced amateur astronomers who want to achieve professional results.\u003c\/p\u003e\n\u003cp\u003eThe 2 mirrors of the telescope have a reflective coating of 92-94% for clearer, higher-contrast images. Compared to the mirrors of \"normal\" telescopes, with an 88% coating, this ensures up to 17% more light.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGreater agility in observation: primary mirror fan\u003c\/b\u003e\u003cbr\u003eOnly a slight, imperceptible hum, but with a gigantic effect: the integrated 12 V fan allows the primary mirror to cool up to 50% faster, so your telescope can reach optimal image quality much sooner. No more long waits!\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eOpen design carbon optical tube\u003c\/b\u003e\u003cbr\u003eMost professional telescopes are open tube. Well, this telescope also benefits from the advantages associated with this design. Carbon grilles are rigid, light and very resistant to temperature changes. In fact, that's another reason why its focus is so stable. Air renewal is better in open tubes and prevents a microclimate from forming inside.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLarge unobstructed aperture: 3\" focuser\u003c\/b\u003e\u003cbr\u003eThe rear end is extremely important. A 3\" linear ball-bearing Crayford focuser 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 to 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: to quickly recover focus\u003c\/li\u003e\n\u003cli\u003eHigh stability: camera support on the optical axis without tilts for a sharp image\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eIndividually adjustable focuser\u003c\/b\u003e\u003cbr\u003eA total of 6 collimation screws will allow you to adjust this 3\" focuser with maximum precision in its mirror optical tube. This will prevent unwanted slippage, keeping the eyepiece or your camera always on the optical axis. Class: this focuser has a homogeneous 3\" diameter, which cannot always be taken for granted, as many similar focusers narrow towards the eyepiece side.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBetter image quality than with SC telescopes\u003c\/b\u003e\u003cbr\u003eRC telescopes are, in essence, completely different from SC or Maksutov. These are open systems without a corrector plate that adjust to ambient temperature much faster than SC telescopes. In addition, by not having 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 that exist. The sharpness of the field of view, including the edge, is impressive. So it's no wonder that virtually 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":53581585383767,"sku":"68060","price":6190.08,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/68060_1_1905fcdc-109b-4293-9d2c-8e4c7df4b254.jpg?v=1779016038","url":"https:\/\/astrotelescopios.com\/en-efta\/products\/ota-de-truss-ligero-ritchey-chretien-pro-rc-355-2845","provider":"Astro Telescopios","version":"1.0","type":"link"}