Testing this 24-70 II some more, I am somewhat dismayed by what I find at close distance, wide open, at wide 24mm end. Compared to where live view focusing stops, even after AFMA, the phase detect AF is hit-and-miss, even on tripod. Often the initial half-press of shutter will be quite a bit off, then a repeat half-press or two will get it to where live view stops. Where it stops also seems to differ based on whether I'm focuing from infinity or MFD side as well as distance from object. At other times, it focuses right at first half-press. This doesn't seem to happen at the 70mm end. Phase detect couldn't be this bad relative to live view in general, could it? Guess will see what Canon service will say/do.