Jimmy, et al; I was using my TV 102, a 4 inch refractor. The eyepiece was a 14mm UWA. I don't have my calculator with me, but I would suppose that gives a 1.5 degrees field of view. The TV 102 is an f/8.2 (or so) scope. I hope that helps; Steve Coe -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.