I'd like to set up my Oly EM1 with back button focus. Ideally I want focus lock on one button (AEL/AFL) and exposure lock on another (Fn2) I can assign back button focus to the AEL/AFL ( or any other button) quite easily but the problem is I can't separate the functions of AFL and AEL. This is a real drag as I use the lock exposure button all the time. I can have one or the other by the look of things. I can't believe such an incredibly customisable camera with so many programmable buttons won't do this. Has anyone worked this out?