The telescope optics: The new Skywatcher Explorer-250PDS Newtonian Reflector telescope includes the same excellent optics as the Explorer-250P Black Diamond series, but with two key improvements. A 10:1 gear reduction focuser was used for greater focusing precision, and the tube was slightly shortened to improve performance in primary focus photography. Even better performance can be achieved when using the Sky-Watcher Newtonian coma corrector (No. 20233) for both visual astronomical observation and photography. Scope of delivery: 250mm Newtonian telescope 9×50 viewfinder 2″ focuser with 10:1 reduction and 1.25″ adapter Eyepiece: 28mm 2″ LET! Power supply and batteries are not included in the scope of delivery!