{"product_id":"ritchey-chretien-pro-rc-406-3250-truss-ota","title":"Ritchey-Chretien Pro RC 406\/3250 Truss OTA","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cb\u003eOmegon Truss Carbon RC Telescope: professional astrophotography for your observatory\u003c\/b\u003e\u003cbr\u003eIs astrophotography your passion, and are you looking for the perfect telescope for your observatory? Ritchey-Chrétien telescopes combine a large mirror optical tube with almost perfect image quality. A pair of hyperbolic mirrors provide a wide, well-illuminated field of view free of comatic aberration, all in a compact format. The result: perfect stars right up to the edge of the image. This is why it is the preferred system for many professional observatories and institutions.\u003c\/p\u003e\n\u003cp\u003eYou too can choose professional technology for your private observatory! Omegon RC telescopes are so well-balanced that they can be used without problems even in the smallest 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 images and a large field of view without correctors\u003c\/li\u003e\n\u003cli\u003eQuartz mirrors: greater focusing stability without the need for readjustments for an always sharp image\u003c\/li\u003e\n\u003cli\u003eCompatible with large format CCD cameras: illumination of approx. 60 mm\u003c\/li\u003e\n\u003cli\u003eCarbon Truss optical tube: rigid open carbon truss system\u003c\/li\u003e\n\u003cli\u003eHigh reflection: 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\u003eHigh-performance electric fan: minimises tube seeing and accelerates 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 crafted: 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 task 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 up to the edge without 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 refractive effects such as chromaticism or dispersion are avoided. The useful region of the spectrum beyond visible light is wider. This way, you can delve into the interesting world of ultraviolet and infrared rays with your camera.\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 exposures. It is very annoying! The advantage of this model is that it has 2 quartz mirrors. It hardly suffers from thermal expansion, so it produces fantastic images and maintains focus throughout the night.\u003c\/p\u003e\n\u003cp\u003eThe 2 mirrors of the telescope have a 92-94% reflective coating for clearer and higher contrast images. Compared to the mirrors of \"normal\" telescopes, with an 88% coating, this guarantees up to 17% more light.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGreater observing agility: fan for the primary mirror\u003c\/b\u003e\u003cbr\u003eOnly a slight, imperceptible hum, but with a gigantic effect: the integrated 12V fan can cool the primary mirror 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 have an open tube. Well, this telescope also benefits from the advantages associated with this design. Carbon trusses are rigid, lightweight and very resistant to temperature changes. In fact, that is another reason why its focus is so stable. Air circulation is better in open tubes and prevents a microclimate from forming inside.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eLarge unhindered aperture: 3\" focuser\u003c\/b\u003e\u003cbr\u003eThe rear end is extremely important. A 3\" linear Crayford focuser with ball bearings provides 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 observing 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 fine focus adjustment\u003c\/li\u003e\n\u003cli\u003eGraduated scale: to quickly regain focus\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\u003eIndividually adjustable focuser\u003c\/b\u003e\u003cbr\u003eA total of 6 collimation screws allow you to precisely adjust this 3\" focuser in your mirror optical tube. This prevents unwanted slippage, keeping the eyepiece or your camera always on the optical axis. Excellent: this focuser has a homogeneous 3\" diameter, which is not always a given, 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. They are open systems without a corrector plate that adjust much faster to ambient temperature 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 available. The sharpness of the field of view, including the edge, 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":53581585416535,"sku":"53815","price":6690.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/6198\/6860\/files\/53815_1.jpg?v=1779016041","url":"https:\/\/astrotelescopios.com\/en-eu\/products\/ritchey-chretien-pro-rc-406-3250-truss-ota","provider":"Astro Telescopios","version":"1.0","type":"link"}