Coma Free GSO 8" Newtonian F4

Aperture 200 mm (8") / focal length 800 mm / photographic speed f/4 High quality parabolic primary mirror with 94% enhanced reflectivity coatings Precise 2" Crayford focuser with 1:10 dual speed transmission Primary mirror cooling fan and battery case 8x50mm Finder Scope and Bracket 35mm 2” CNC extension tube Tube rings and Vixen style dovetail 2” Coma corrector Total weight is 28 lbs with Free Shipping  in US mainland only   Basic Manual for Focuser Adjustment & Optical Alignment The Advantages of Newtonian: The Newtonian telescopes are free of chromatic aberration found in refracting telescopes.  They are usually less expensive for any given objective diameter (or aperture) than comparable quality telescopes of other types. A short focal ratio can be more easily obtained, leading to wider field of view.   The difference between Newtonian and Dobsonian: Basically, the optical performance on Newtonian and Dobsonian is almost the same; however, the design of backfocus between them