Sky-Watcher Classic 250P Dobsonian Telescope

Overview 10” (254 mm) Dobsonian-style Newtonian 1200 mm focal length (f/4.7) 2" Crayford-style focuser with 1.25" adaptor 4-element Plössl 25 mm and 10 mm 1.25" eyepieces 9x50 finderscope Solid rockermount with Teflon bearings and tension clutch for altitude Teflon bearing for azimuth The Sky-Watcher Traditional Dobsonian Telescope 254mm/1200mm (10") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this model include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This model also include the new feature-tension control handle. Specifications Optical Design: Newtonian Reflector Aperture (mm): 254 mm (10 in) Focal Length: 1200 mm Focal Ratio: f/4.7 Focal Length of Eyepiece 1 (mm): 25 mm (0.98 in) Magnification of Eyepiece 1: 48 x Focal Length of Eyepiece 2 (mm): 10 mm (0.39 in) Magnification of Eyepiece 2: 120 x Finderscope: 9x50 Viewfinder Mount Type: Dobsonian Highest Useful Magnification: 508 x Limiting Stellar Magnitude: 14.7