I have the 5D Mark ii and the 24-105mm lens (which has full time manual focus). The 5D Mark ii sometimes fails to take the picture if its autofocus fails (something my Rebel XSi seems to do better with, but whatever). When this happens, why can't I just tap the focus ring to override the autofocus and then take the picture? Even when I move the focus ring, it still does not take the stupid picture when I press the shutter. When I switch to manual focus it takes the pictures perfectly.
I thought that was how full time manual focusing worked? Why won't it take my picture?
Does anyone have any other suggestions for getting the camera to actually take the picture when autofocus fails?