Advanced Astromaster (made by Celestron, part number 93900)with
10,000+ object database. Contains RS-232 serial interface, plus
set of 4092 step encoders and cables (plus mounting hardware specific
for Ultima telescopes). Includes entire NGC and Messier catalogues,
plus stars and other deep sky objects. The Astromaster can be used
with fork mounted or equatorial scopes. New set is $550. Asking
half of that or $275. Thanks.