Been looking at the various autofocus modes on the GH3 and acording to the manual AFF AFS and AFC all autofocus when the shutter is half depresed however if you just turn the camera on and point they all focus (it waits a second or two).

There does in reality seem no difference between the 3 modes. They all focus when you move and half pressing shutter kickes in autofocus imediatly. Even AFS refocuses when shutter is half pressed when things move.

Anyone got any insight on this?

Ben

Is continuous autofocus set to on in the cameramenu? (under motion picture, 2nd page)

Yes, are you saying this makes all three modes the same? If so why have them as the AFC is continuous?