The telescope optics: The new Skywatcher Explorer-300PDS Newtonian Reflector telescope includes the same excellent optics as the Explorer-300P 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 Skywatcher Newtonian coma corrector (No. 20233) for both visual astronomical observation and photography. Scope of delivery: 300mm 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!