The Ultima 2000 is a Schmidt-Cassegrain design. It has an 8 inch aperture, 80 inch focal length, and an f/ratio of 10 (reduceable to 6.3 with the optional focal reducer/corrector). Both the primary and secondary mirrors have Celestron's Starbright Coating while the corrector plate has anti-reflective coatings (MgF2) on both sides. The altitude and azimuth axis each contain a slewing and tracking motor. An optical encoder on each axis allows the scope to be moved manually without losing its alignment. Power is supplied by either 8 AA alkaline batteries or an external power supply (12 VDC). The OTA is 16 inches long, 9 inches in diameter, and fits neatly inside its own carrying case. Total weight of the scope and base is 31 pounds. The tripod is an additional 19 pounds.

Ted Kurkowski's SCT Site for Beginners
http://sctscopes.net/index.html

Todd Ellsworth's Celestron 8" Ultima 2000 FAQ
http://home.austin.rr.com/tie/ultima2k.html