On a shoot last night I tried the backbutton focus, which I haven't used for a long time because back then you needed to half-push the trigger and then lock focus with the AF-L button. Too cumbersome! Wow, when did they change that? Now the AF-L button can focus! One more thing I'd like to have: the option to auto unlock the focus after taking the image. Or re-focus when pushing the AF-L button again. To make clear: I still want the lock function, not hold the AF-L button. Does anyone know?