Reflector telescope aperture 406 mm focal length 1 800 mm focal ratio 144 optical systems reflector newton suitable for beginners enthusiasts max useful magnification 812 x tracking dobson mount dobson rockerbox minimum useful magnification 56 finderscope 9x50 eye piece 2 crayford 110 eyepiece type super plssl included in delivery synscan controller eyepiece adapter 125 2