Sky Watcher 6in. Traditional Dobsonian Telescope. Classic 150P Dobsonian Telescope is made with a "paraboloidal" primary mirror that eliminates spherical aberration while a four-arm secondary- mirror bracket with fine supports (0.5mm thick) reduces diffraction spikes and light loss. In addition the Sky Watcher 6in. Classic 150P Dobsonian Telescope includes a 2" focuser with a 1.25" adapter allowing the use of either eyepiece size. This models also include the new feature-tension control handle. For a great way to be sure you are using one of the best telescopes the industry has to offer choose the Sky Watcher 6in. Classic 150P Dobsonian Telescope. Specifications for Sky Watcher 6in. Traditional Dobsonian Telescope: Manufacturer: Sky Watcher Color: White Focal Length: 1200 mm Included Accessories: Finder Scope Features of Sky Watcher 6in. Classic 150P Dobsonian Telescope: 6" (152 mm) Dobsonian-style Newtonian 1200 mm focal length (f/8) 2" single-speed rack-and-pinion focuser with 1.25" adaptor 4-element Plossl 25 mm and 10 mm 1.25" eyepieces 6x30 finderscope Solid rocker-mount with Teflon bearings and tension clutch for altitude Teflon bearing for azimuth Package Contents: Sky Watcher 6in. Classic 150P Dobsonian Telescope Finder Scope Sky Watcher S11600: 6in. Traditional Dobsonian Telescope