Sky watcher explorer 130m eq2 130mm 51 f900 motorised newtonian reflector telescope the sky watcher explorer range are standard newtonian reflectors of excellent quality and versatility ranging in aperture from a respectable 130mm to an incredible light gulping 300mm aperture catering for astronomers of all levels whether your interest is deep the moon and planets or a combination of both the explorer range offers excellent all round diffraction limited performance tube material