LARGE APERTURE: Get a bright, bold viewing experience at a fraction of the cost of other optical designs. INNOVATIVE COLLAPSIBLE DESIGN: Unique strut design allows for optical tube to collapse for ease of portability while keeping collimation. BUILT-IN WIFI: Control your telescope using a smartphone or tablet with Sky-Watcher’s proprietary built-in wifi signal. ALL METAL GEARING: Using all-metal gearing on a pair of DC servo motors, the SynScan Dobsonian combines the precise automated tracking of a computerized GoTo telescope with the bright large-aperture viewing of a Dobsonian. 94% REFLECTIVE MIRRORS: Fully multi-coated borosilicate primary and secondary mirrors deliver exceptional views. 42,000 OBJECT DATABASE: SynScan hand controller with 42,000 plus object database will keep even the most experienced astronomer busy for countless observing nights. COMES COMPLETE: All accessories such as, 2-inch Crayford-style focuser with 1 1/4-inch adapter, two super wide-angle eyepieces (25mm and 10mm), and 9x50 straight-through finder scope are included with purchase. STURDY AND LIGHTWEIGHT DESIGN: When fully assembled, the Dobsonian weighs only 72 pounds fully assembled (33 pound tube, 39 pound base) Max focal length: 1200