This is actually my second 900 GTO. In a moment of weakness I sold the first one thinking I could get by with something less expensive. I couldn't. There simply is no substitute for the accurate pointing, smooth tracking, and well-thought out user interface that define the 900 GTO.
My primary interest
is galactic imaging at relatively long focal lengths (when conditions
permit). Even when using AO, I have found that the 900 makes a lot of
difference in the quality of images I can obtain.