So I was at a wedding rehearsal the other day. Super dark as always. I was testing out the lenses. I put the 70-200 is ii on my 50D and tried to focus on pew near the back of the sanctuary. The camera couldn't get an AF lock presumably due to the low light. I switched to my 5D mark ii body and tried focusing around the same area. The AF wasn't super fast but it did lock focus. This made me wonder, is the 5d's center AF point more sensitive in low light than the 50Ds? I know the 5d's gets bashed a lot but I'm trying to figure out what caused this. Not trying to start a flame war here but just curious if someone knows the actual sensitivity of the center AF point. Thanks.