SkyWatcher 10 GoTo Collapsible Dobsonian Brand New Includes Limited Two Year Warranty The SkyWatcher 10-Inch Collapsible GoTo Dob is precision engineered instrument that will allow you to easily find and enjoy viewing night sky treasures, such as Planets, Nebulae, Star Clusters, Galaxies and much more. With its patented collapsible tube design, these Dobsonians are truly the ultimate in portability and performance. The SynScan™ AZ hand control allows you point your telescope at a specific object, or even tour the night sky at the touch of a button. The user-friendly menu system allows automatic slewing to over 42,900 objects. The elegant truss tube design was carefully engineered to combine ease of use, extreme portability and consistent performance in an affordable package. Unlike other truss tube designs, the SkyWatcher Collapsible Dobsonian does not need to be disassembled between uses. It transports as two compact pieces that can be assembled and ready to use in just seconds! It is easy to collimate once set up, and it holds its collimation throughout the evening. 10-Inch Collapsible GoTo Dob Features 10 Inch Aperture 254 mm Focal Length 1200mm, f/4.7 Focal Ratio 9 50 Finderscope Truss Tube System Alt-az Rocker Design Mount SynScan Computer Hand Controller 2 Single-Speed Crayford Focuser Teflon Bearings Tension Clutch Collapsible OTA Design 42,000 Object Database Specifications .boldTbl{ font-weight bold;} .specs td, table.specs th {padding 4px 10px;} Optical Design Newtonian Reflector Aperture mm 254mm 10 in Focal Length mm 1200 mm 47.24 in Focal Ratio f/4.7 Motor Type DC Servo Motors Eyepiece Barrel Diameter 2 Focuser Style Crayford/Crayford Style Focuser Size 2 Finderscope 9x50 Focuser Speed Single Speed Telescope Mount Type Dobsonian Focuser Speed Single Speed Eyepieces 4 Element Plossl Eyepieces 25mm Power 48x Eyepieces 10mm Power