13 Jul
2004
13 Jul
'04
10:18 p.m.
If you go the platform route, DO NOT build a straight Poncet. It is unstable with large loads. Build one of the variants that does not use inclined planes, but conic sections and rollers instead. If you plan on imaging, computerizing an alt-az mount will mean field rotation must be compensated-for. If you like spending time at a computer then this isn't a problem. Using a platform eliminates field rotation. You can even use the altitude motion as true declination motion if you plan your targets when close to the meridian (best place to shoot them anyway, when they are highest). C. __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail