121
EOS Bodies - For Stills / Re: Newbie question about testing out my Mark III with samples.. HELLLLLP!
« on: April 18, 2012, 11:13:23 AM »
I would stop using the expansion points, switch over to spot AF, and then try again.
With spot AF, you're telling the camera that THIS is where you want focus, and to not even bother taking the picture till that spot is in focus. With expansion points in the mix, you're basically saying that if there isn't enough contrast at that point, go ahead and see if there's enough contrast at any of the others - and shoot that.
Which is fine, if you're dealing with more depth of field... i.e. if you're shooting your dog from farther off, as he runs through the yard. If you're trying to nail his eye, with shallow DOF, you want to take the camera by the horns and show it EXACTLY where you want that focus.
With spot AF, you're telling the camera that THIS is where you want focus, and to not even bother taking the picture till that spot is in focus. With expansion points in the mix, you're basically saying that if there isn't enough contrast at that point, go ahead and see if there's enough contrast at any of the others - and shoot that.
Which is fine, if you're dealing with more depth of field... i.e. if you're shooting your dog from farther off, as he runs through the yard. If you're trying to nail his eye, with shallow DOF, you want to take the camera by the horns and show it EXACTLY where you want that focus.