SkyWatcher 12" GoTo Collapsible Dobsonian Brand NewIncludes Limited Two Year Warranty The SkyWatcher 12" GoTo Collapsible Dobsonian 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. 12" GoTo Collapsible Dobsonian Features: 12 Inch Aperture (305 mm) Focal Length: 1500mm, f/4.9 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 ReflectorAperture (mm): 305mm (12 in)Focal Length (mm): 1500 mmFocal Ratio: f/4.9Motor Type: DC Servo MotorsEyepiece Barrel Diameter: 2"/1.25"Focuser Style: Crayford/Crayford StyleFocuser Size: 2"Finderscope: 9x50Focuser Speed: Single SpeedTelescope Mount Type: DobsonianFocuser Speed: Single SpeedEyepieces: 4 Element PlosslEyepieces 25mm Power: 60xEyepieces 10mm Power: 150xTracking Rates: Sidereal, Lunar, SolarTracking Mode: Dual Axes TrackingGo-To Pointing Accuracy: Up to 5 arc minAlignment Method: Brightest-Star Alignment, Two-Star Alignment