I have a Panasonic DMC G7 and I'm slightly confused about how I have two different methods of specifying AF. One is: AFS/AFF, AFC, or MF. (Page 149 of the manual ftp://ftp.panasonic.com/camera/om/dmc-g7_adv_en_om.pdf) Another, is: Face/Eye, Tracking, 49-Area, Custom/Multi. (page 151) Quick question: Basically, when should I use one, the other, and when should I use both? Slightly longer question: I read this G3/GX1 help - difference between AF tracking and AFC which seems to sort of explain it.... What I gather from that is AFC specifies whether it carries on autofocussing, and Face/Eye, Tracking, etc, specifies what part of the screen it (carries on) autofocussing on. Right so far? But how does "tracking" with AFS make sense then - because Tracking is saying 'keep focussing on this object as it moves', whereas AFS is saying 'focus once and then don't readjust again'. Basically, if I'm shooting, say, moving vehicles, while panning (or trying to), what should I have it on? I tried this today and basically when I had the (latter) AF mode on Tracking, I found it unreliable, it wouldn't lock on. The auto focus area just flashed a red square in the middle of the screen. Was I just using it wrong?