![]() In addition to reducing the focal length and f/ratio the Celestron Reducer/Corrector Lens also reduces field curvature significantly so you get a flatter, well corrected field. reduction factor of the focal reducer, and camera type, Astronomy Tools calculates a FOV of 0.93° x 0.52° and an image scale of 1.72'/pixel for the ASI385MC camera. With a reduction factor of 0.63x, these reducers only work with Schmidt-Cassegrain scopes. Celestron AstroMaster 114EQ Telescope 31042 319.95 Out of Stock Out of Stock Free Contiguous US Shipping Celestron PowerSeeker 127EQ Telescope 21049 219.95 Out of Stock Out of Stock Free Contiguous US Shipping Sharpstar 130mm f/2.8 HNT Hyperbolic Newtonian Astrograph 13028HNT - Available in 3 Colors From 1,795. But modern materials, design, and manufacturing techniques have enabled the production of high-quality RC scopes that are remarkably affordable. The 94175 Reducer/Corrector Lens is not compatible with Celestron EdgeHD optical systems. Celestron and Meade f/6.3 Focal Reducers. The difficulty of figuring the optics of an RC meant that these telescopes have, in the past, been prohibitively expensive for amateur astronomers. And they have open optical tubes, which can make it easier to come to thermal equilibrium with their surroundings. ![]() They do not require a corrector lens, so they have no chromatic aberration like refractors or Schmidt-Cassegrain telescopes. ![]() They have flat fields that provide pinpoint star images right to the edge of the field of view. Free US Shipping GSO 2' Photo-Visual Coma Corrector for Newtonian Telescopes with 20mm M48-Threaded Spacer 140. RC scopes use primary and secondary mirrors ground to precise hyperbolic figures, which means they suffer little of the aberration and coma that plague Newtonian telescopes. Widely used in professional telescopes around the world, the Ritchey-Chretien (RC) design offers many advantages for serious astronomical imagers.
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