Celestron Nexstar 4GT 4" Computerized Go-To Telescope (Telescope Only) Ideal telescope for observing and photographing the wonders of space Incredible light-gathering and a full degree field of view give you views 189% brighter than a 60mm refractor Computerized capabilities like Auto Align, automatic Tour Function, easy-to-use hand control and 4,000+ object database Star Pointer is the quickest and easiest way to point your telescope exactly to the desired object in the sky 102mm (4 inch) diameter Maksutov-Cassegrain optics