Celestron EdgeHD 9.25"" - General Features * 9.25 EdgeHD Optical Tube Assembly * Aluminum Optical Tube * Celestron"s premium StarBright XLT coatings * 2350mm focal length (f/10) * 23mm Axiom 2"" eyepiece included (102x) * 9x50 finderscope to help accurately find objects * 2"" diagonal provides more comfortable viewing position when observing objects that are high in the sky * Mirror Support Knobs hold the mirror in place and reduces image shift during imaging. * Tube vents with integrated 60 micron mesh filter allowing hot air to be released from behind the primary mirror. * Fastar Compatible optical tubes are equipped with a removable secondary mirror for fast f/2 ccd imaging * Includes dovetail rail compatible with CGE mount Specifications * Optical Design : Aplanatic Schmidt * Aperture : 234.95 mm (9.25 in) * Focal Length : 2350 mm (92.52 in) * Focal Ratio : f/10 * Finderscope : 9x50 * Optical Tube : Aluminum * Eyepiece 1 : 23 mm (0.91 in) * Magnification 1 : 102 x * Star Diagonal : 2"" w/ 1.25"" adapter * Optical Coatings : StarBright XLT * Secondary Mirror Obstruction : 3.35 in (85.09 mm) * Secondary Mirror Obstruction by Area : 13.1 % * Secondary Mirror Obstruction by Diameter : 36.2 % * Optical Tube Length : 22 in (558.8 mm) * Optical Tube Weight : 21 lb (9.53 kg) * Dovetail Compatibility : CGE Mount/ Orange * 10% INSTANT SAVINGS! REGULAR $2299 SALE ENDS 8/31 * Stunning 9.25-inch EdgeHD aluminum OTA * 9x50 finderscope included * Support knobs hold mirror in place to reduce image shift * Features single 22mm Axiom 2-inch eyepiece