01-06-2017 05:47 PM - edited 01-06-2017 05:48 PM
How about this for starters?
"... the camera will take a shot when you fully press the shutter and it will do this even if it hasn't had time to focus. So you do have to make sure you're getting the focus before you fully press the button or you'll be disappointed with the results."
It is flakey at best. I have used it. I have gotten it to work. I don't like it. I see it as a solution to a problem we didn't have.
But, the 7D2 is very good at focusing on moving subjects. Don't count it out. I have AF points light up across the viewfineder as the subject has moved, and every shot has been in focus.
I would compare it to the static displays of active AF points you see when you are in Green [A] mode, with several points lit up. Just the points that can lock focus light up, but they all seem to fall on the moving subject, tracking it quite well.