Refractor telescope aperture 150 mm focal length 1 500 mm focal ratio 110 optical systems schmidt cassegrain refractor suitable for enthusiasts max useful magnification 354 x mount azimutal einarm goto tripod steel tripod features wifi lens barrel length 410 mm minimum useful magnification 21 coating starbright xlt resolution power 093 bogensekunden light collecting power 7mm pupil 459 border size 134 mag total weight 161 kg