So, I just got my 5DMK3 in the mail (yay) and I'm completely confused by this AF system.
For some reason it's set to "Single Point AF (Manual Selection) - if I go in to my "select AF area selec. Mode option (the 4th sub option under AF) I have a series of choices :
SINGLE POINT AF
AF POINT EXPANSION
AF POINT EXPANSION (SURROUNDING POINTS)
61 POINT AF
I can choose to Check or Uncheck my choices - I can check and uncheck all but the second one (it won't even allow me to highlight it) SINGLE POINT AF.
When I look through the viewfinder I can either configure it to see only that SINGLE POINT AF or the 61 POINT AF (however, the 61 point af lights up every AF point no matter how or what I'm shooting - it's not showing me what i'm specifically focusing on).
Sorry if this doesn't make much sense - it's very confusing. I've read through the entire AF section of the manual and I cannot seem to figure this out.
I'm used to either Nikon - where it will light up the focused AF boxes or the old Canon's (5dmk2) where it would also only light up what was in focus.
The MK3 keeps allowing only SINGLE AF or the 61 where it all lights up.