Hey all, I recently purchased the 5DmkIII due to the stellar reviews pretty much everywhere and anywhere. I will preface this, with the fact that I've only shot 1 wedding with it so far and a few family/engagement sessions, so my usage hasn't been hugely significant yet. I do love the new features, such as the dual card slots and the fact that I can actually use the other outer focus points. However, am I in the minority that doesn't care about the 41 cross-types? I feel like my shooting has become slower due to the time now necessary to get to the focus point I need, whereas with the mkII, I would simply point the multi-controller in any of the 8 directions. I mean I know with the mkIII I can use the 9 point option as well, but I did prefer the more spread-out diamond format of the mkII.
My biggest complaint, however, is that shooting in low-light, the focus locking is CRAZY slow (even with focus-assist from my 580EXII). I know it's been addressed in previous threads, but has anyone actually found a fix for this? shooting in low-light receptions is so much more frustrating to me now, since I never really had a problem with the mkII locking focus (with the center point, obviously). I think I'll give it a few more weddings, but I feel like maybe I should just go back to the mkII for receptions to lock immediately. People here have said that the mkIII does, in fact lock focus, but there is a delay in the confirmation beep/red flash that it actually has locked on. I hate "guessing" if it has locked on or not, and feel that paying so much more for the mkIII, it should be an improvement in 99% of all aspects over the mkII, so this just kind of irks me a little.
Other than that, I mean it's a great camera, and of course I don't regret the purchase, but I shouldn't be considering using the mkII over the mkIII in ANY situation.