The Sky-watcher Newtonian telescope are a type of reflecting telescopes invented by the British scientist Sir Isaac Newton (1643-1727)
Sky-watcher Newtonian telescopes are usually less expensive for any given aperture than comparable quality of other types. Since light does not pass through the objective (it only bounces off a mirrored surface) exotic glasses are not needed, the Sky-watcher Newtonian telescopes material only needs to be able to hold an accurate figure. There are no lenses or corrector plates to cause chromatic aberration as in a refractor. The eyepiece at the top end of the reflecting telescopes combined with short f-ratios allow a shorter and more compact mounting system, reducing cost and adding to portability.
