http://astrosurf.com/antilhue/index.htm
Antilhue-Chile (Home) Website
ies only a decade ago.
Often, the targets are very faint. So - even with theextremely sensitive CCD sensors - long exposures ranging from a few minutes toseveral hours are needed to capture intricate detail. Extreme precision isrequired of the mechanics of telescope, focuser and mount to track
This is the description of the above website given by a member. Please see the original website linked above for more information.
added by eltula on 2007-04-08 12:33:41