OK here I'm lost and need to ask. AF red points - please explain? I can set up my view finder so that the FP lights up red but then goes black again. My 7D does the same thing. I'm not familiar or perhaps can't remember any other scenario.
in the 5D2 and previous models, in AI Servo the selected AF point would stay lit in red as it tracked the subject.
very useful for shooters like me who shoot in dark conditions where it's hard to see a black AF square.