Thanks for your prompt reply and info. I have not purchased a camera yet. I've tried friend's cameras and at the store. With my film SLR I would be adjusting the focus manually while tracking the subject.
When you push the button half way down can you hold it there? With the camera keep...
With my "old" film SLR cameras (Pentax MX and Mamiya RB67) I got the image I visualized when I pushed the button. With the new DSLR's there seems to be a slight lag time from pushing the button to grabbing the image. Are there any DSLR cameras that are as fast as my "old" cameras?