Its not that useful, manual focus is not fun. Also whitebalance shifts a lot when you are moving around and focusing on new subjects. Taking tank videos it does a pretty good job if you have it mounted on a tripod and you never move it. You can do some nice videos where the subject is out of focus and then slowly comes into focus, like racing. If AF worked then it would be just about as good as most consumer level HD camera's. I am no way shape or form a pro. Check out some of the video's on youtube, that will give a good idea.