D7000 Liveview switch
If you are using LiveView light entering through the VF which is not
covered by your eye/face can have an effect on the AE. If you are
shooting all manual it isn't going to matter. Nikon usually includes a
plastic, slide-on cover for the VF on their DSLRs. Otherwise just use a Post It Note.
ok, thanks. I have one of those covers and understood what it was for, but
didn't realise it should be used when using using liveview (and
Nige Danton - Replace the obvious with g.m.a.i.l