Sky watcher explorer 200p heq5 pro 200mm 8 f1000 parabolic synscan go to newtonian reflector telescope all sky watcher black diamond newtonian reflectors feature 05mm ultra thin secondary mirror supports to reduce diffraction spikes and light loss and high quality paraboloidal primary mirrors to eliminate spherical aberration the mirrors are parabolised to bring all the light rays to the same focal point to produce sharp contrasty images which are full of detail ideal for planetary