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