Sky watcher skyliner 250px classic 254mm 10 f1200 parabolic dobsonian telescope these instruments offer an incredible aperture to price ratio popularized by john dobson in the late 1970s is a very simple but effective method of mounting a newtonian reflector 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 of the design is to correctly balance the