I just upgraded to a Canon XTi, like a week and a few days ago! I'm loving it! I used the auto focus the first few days, and then decided I needed to learn the manual focus and programmable modes if I wanted to do any decent aquarium photography, since it had this annoying tendency to focus on the blade of grass in FRONT of the actual subject rather than on the subject! As I'm learning, I'm getting a heck of a lot more crummy shots than good ones!! *LOL!*Great shots! What kind of camera are you using?