I need help. I have gotten back into doing some bif pics and my keeper rate sucks. I know it is not the camera nor the lens, birds in trees are just fine as are my other shots. I am not getting good focus on my bif pics. I am shooting in av, ai servo, high speed, af point expansion, and keeping my shutter speed above 640. I also am using image stabilization. Any suggestions on what I need to do?


