always always keep in mind the the dof is proportional not only to the aperture used but to your distance to the subject.. When I\'m worried about the slow af, instead of stopping down the lens I step a bit backward.
Shooting someone even walking slowly towards you at full body wont focus fast enough, if you are further from your subject like car moving at 40 mph can be track successfully at1.2 with a 5DM2
