EOS AF point types: X + | - (f2.8, f5.6, f8)?
I have yet to find a good comprehensive reference for which EOS models (including xxD models, Rebel/xxxD, and Full Frame xD models) have which kinds of AF sensor point types. If I am not mistaken there are several types of sensor points (I'm talking about only Phase-Detect AF here):
+ regular cross
+X "dual cross"
Additionally, some are sensitive only at f/2.8 or above, some are sensitive at f/5.6 or above, and I think I read somewhere that on some cameras, some points are sensitive all the way down to f/8.
So, which EOS models have which kinds of PD-AF points, and what aperture ranges do those points operate at. I guess we can start by compiling a list for all EOS models currently in production. [Note: I posted this to the 7D / 10D-70D forum because it is in the middle... I'd post this to a general EOS forum if one existed].