Catadioptric telescope aperture 127 mm focal length 1 500 mm focal ratio 1118 optical system maksutov cassegrain suitable for beginners experts enthusiasts max useful magnification 254 x tracking altazimuth mount altazimuth goto synscan az s tripod steel tripod features goto telescope feature astrophotography suitable astrophotography function digiscoping minimum useful magnification 18 resolution power 091 bogensekunden light collecting power