Refractor telescope aperture 90 mm focal length 900 mm focal ratio 110 optical system refractor suitable for beginners max useful magnification 180 x tracking equatorial tripod steel tripod astrophotography function none resolution power 128 bogensekunden light collecting power 7mm pupil 170 border size 116 mag eye piece 125 eyepiece focal length in mm 25 63 mm total weight 12 kg included in delivery red dot finder software cd rom tr