**Revolutionary New Optical System -- **Newly Designed Computerized Equatorial Mount -- Celestrons amazing new Astrograph features a 20" f/6.8 coma-correct, flat-field Dall-Kirkham Cassegrain (corrected Dall-Kirkham) optical assembly that delivers superb resolving power that is free from performance-limiting coma and field curvature. Because of the C20s flat-field design, you'll find it a joy to use for imaging as well as visual use. -- The Astrograph comes standard with Celestrons advanced StarBright reflective coatings, a conical primary mirror with low thermal mass and three cooling fans to minimize cool-down time, a carbon-fiber truss system that minimizes refocusing due to temperature changes, a high-performance computerized German Equatorial mount and a professional-class pier/tripod. |
