When I shoot moving objects I choose AI Servo and manually select an AF point (normally center). For moving subjects like birds, wildlife, vehicles or people is this the correct thing to do or am I better off keeping the the AF point set at automatic and start focusing at center then let the camera track the subject. If ever I lose the subject in frame I just reacquire a center AF lock on moving subject then let the camera track it again.
This is in relation to the 40d, 5d and 5d Mark II bodies.
Pao, I think you will find that it is often a personal preference. I can give you my perspective, but understand I have a lot to learn. I pretty much keep my cameras set to AI Servo all the time. The only exception is if I am doing macro or flora where I want a specific point to be the sharpest. I choose center point most of the time. With the new 7D I use center point with assists for BIF. Again, if I am doing macro, flora I will choose an off center point to maintain composition but still focus on the exact point I want.
Canon AI Servo Techniques
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