SkyWatcher 12 Collapsible Dob Brand New Includes Limited Two Year Warranty The SkyWatcher 12-Inch Collapsible Dob Telescope features a large-aperture, short focal-length, Newtonian reflector. With this telescope you have tremendous light gathering power. Some prominent deep-space objects that can be seen under the right viewing conditions in an 12 SW Dob are the Horsehead Nebula, M76, M97, M61 and many more. This telecope has multi-coated, 4-element Plossl eyepieces 25mm and 10mm that provide a spacious 52 Apparent Field of View. The Sky-Watcher's optical tube design utilizes their proprietary truss support system. That system allows the optical tube's front and back tubes to collapse together, aligning on the truss support rods, and locking down for secure transport. An 8x50mm right angle optical viewfinder provides both magnification and light gathering to help narrow your search for those elusive fuzzies while star-hopping. The standard, backlash-free, 2 Crayford Focuser insures ultra smooth focusing adjustments. 12-Inch Collapsible Dob Features 12 Inch Aperture 305 mm Focal Length 1500mm, f/4.5 Focal Ratio 8 50 Finderscope Truss-support System Dobsonian Solid Rocker-mount 2 Single-Speed Crayford Focuser Teflon Bearings Tension Clutch Collapsible Tube Design Specifications .boldTbl{ font-weight bold;} .specs td, table.specs th {padding 4px 10px;} Optical Design Newtonian Reflector Aperture mm 305mm 12 in Focal Length mm 1500 mm Focal Ratio f/5 Eyepiece Barrel Diameter 1.25 Maximum Useful Magnification 720x Lowest Useful Magnification 44x Limiting Stellar Magnitude 14.9 Finderscope 8x50 Finderscope RA Viewfinder Mount Type Dobsonian Focuser Size 2 Focuser Speed Single Speed Eyepieces 4-element Plossl Eyepieces 25mm Power 60x Eyepieces 10mm Power