On Sat, 16 Apr 2005 16:45:42 +0000 (UTC), "Sox-n-Eagles Fan"
I'd recommend a piggyback guider- a fast refractor between 200mm and
800mm focal length (it does not need to be very good). This will give
you a much wider field of view than you would get with an OAG, making it
a lot easier to get a guide star in the field. It also helps keep your
instruments close to the rear of the scope, which reduces problems with
flexure, puts you closer to the optimum optical position, and often
results in better guiding.
Chris L Peterson