The sky watcher skyliner 200p classic 203mm 8 f1200 parabolic dobsonian telescope offers an incredible aperture to price ratio the dobsonian mount popularised by john dobson in the late 1970s is a very simple but effective method of mounting a newtonian reflector based on the alt azimuth principle fast and easy to set up the dobsonian mount consists of a box type mounting which allows the telescope to pivot in altitude while the box itself is rotated on a base in azimuth the secret