LIMITED TIME OFFER - receive a $100 Edmund Scientifics Gift Certificate with any telescope purchase over $500 (before shipping and taxes). Gift certificate is shipped at the time of your telescope order, and cannot be used on your original telescope purchase -- The StarHopper Dobsonian Telescope by Celestron features a 10" aperture. Dobsonian telescopes are recognized within the astronomy hobby community as an excellent value for the aperture size, and the Celestron StarHopper 10 Dobsonian Telescope is as rich in features as it is in value. -- The Dobsonian configuration is a Newtonian optical tube mounted on an altazimuth mount. The optical system features a large primary mirror at the bottom of the tube which collects light and concentrates it onto a small secondary mirror, which reflects the light out the side of the tube and into the eyepiece. -- The StarHopper 10 is easy to observe with-the user navigates through the night sky by simply moving the tube up or down, and left or right, by hand. -- The StarHopper 10 uses optical quality BK-7 glass, the same high-quality glass used in most binocular prisms and refractor telescope lenses as well as a roller track bearing on the azimuth surface providing dozens of support points for smooth swivel motion. -- This 10" model has a cooling fan built-in to the rear cell to decrease cooling times. -- StarHopper 10 Special Features: -- 10" Primary Mirror. -- 50" Focal Length. -- BK7 Optical Quality glass. -- Roller Track Bearing on Azimuth Surface. -- Variable Tension Clutch System for proper balance & smooth control in both altitude and azimuth. -- Includes 32mm e-lux 2" eyepiece and 9 x 50 finder scope, 2" focuser and 1.25" adapter, cooling fan and 9-point mirror cell. -- *Special Handling Charges Apply --