Hello I thought I'd kick in with a question I've been messing with since I saw a post here on saving battery life. On my E-M10 I can set IBIS to activate on half-press (default) or when full pressing. What's the difference? Besides the obvious Will it be just as efficient on full press? If yes, why even the option to be able to IBIS on half-press? I can hear the IBIS working as long as I have the button pressed, so I guess it does drain unneccesarily. Thanks!