Mine will manually focus just fine in AF mode, on both my 7D and my 5DII, without pressing any buttons. But I went back to try one more thing, and you're right - it's a setting difference between our cameras...but I won't call yours or mine funky. []


I use back-button AF (on the 5DII, that's C.Fn IV-1 set to 2) - the AF-ON button on the back is for AF+metering (same as the shutter half press for you), while the shutter half press just starts metering with no AF. When I change it to the default (0) where the shutter button does both AF and metering, if behaves as you describe - with the lens set to AF, MF only works when the shutter button is half-pressed.


That's not a behavior I would have expected (logic would say if you need to half press the shutter, I'd need to press the AF-ON button for MF to work on the 85L, right?), but I like it the way it is!


--John