If you were asked to describe the ideal telescope for amateur astrophotography, one that offered unparalleled performance wrapped in a compact design at an affordable price, your description would likely match our new 6" f/9 Ritchey-Chretien Astrograph. As a leading supplier of affordable imaging equipment and solutions for amateur astronomers, Orion is proud to introduce this highly regarded telescope design used by advanced astrophotographers and professional observatories worldwide - and even by the Hubble Space Telescope!

Previously available only in larger apertures that cost thousands more, the outstanding optical design of the Orion 6" f/9 Ritchey-Chretien Astrograph will allow you to capture spectacular, detailed images of deep-sky objects like never before. In contrast to conventional Newtonian reflector and Schmidt-Cassegrain systems that are susceptible to coma away from the center of the field, the Ritchey-Chretien utilizes hyperbolic primary and secondary mirrors to achieve wonderfully flat images that are virtually coma-free. In our 6" model, the mirrors are made of BK-7 optical glass with enhanced aluminum 94% - 96% reflectivity coatings, to provide diffraction-limited performance. Since there are no lenses involved, images are also free from chromatic aberration, which affects all but the finest, most expensive apochromatic refractors.

The Orion 6" Ritchey-Chretien Astrograph is ideal for use with small-format CCD cameras like our StarShoot line, as well as DSLR cameras, for deep-sky and solar system astrophotography. The telescope's wide, fully illuminated flat field produces pinpoint star clarity all the way to the edge of the camera's sensor.

The Orion 6" Ritchey-Chretien Astrograph features a machined, dual-speed (10:1) linear-bearing Crayford-style focuser with an engraved millimeter scale on the drawtube. The robust focuser provides precise fine focus adjustment without slippage or flexure with heavy accessories attached. One 2-inch and two 1-inch extension rings are included for adjusting the focus position for various cameras.

Orion Ritchey-Chretien Astrographs have been designed with collimation in mind. With an optical instrument of this caliber, precise optical alignment is of paramount importance. Each Orion RC secondary mirror is precisely center-marked to facilitate collimation and we even include a Cheshire collimation tool to make proper alignment of optics as convenient as possible.

The 19-inch enameled steel optical tube weighs only 12.3 lbs. and features a dovetail mounting bar underneath, for trouble-free setup on medium or large-sized Orion equatorial mounts. The inside of the optical tube is fortified with eight computer-positioned light baffles, and the primary mirror baffle tube and secondary mirror light shield are also highly baffled to ensure maximum image contrast.

Without a doubt, our 6" Ritchey-Chretien Astrograph brings advanced astrophotography performance into the realm of affordability for most amateur astronomers. More affordable than comparably sized apochromatic refractors and without the coma that afflicts Newtonian reflectors, the Orion 6" f/9 Ritchey-Chretien Astrograph Telescope will take your astrophotography to new heights! One-year limited warranty.

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

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