« on: March 01, 2012, 03:29:34 PM »
I actually only took one single photo above 1.4, for more DOF I think the 70-200 is the way to go indeed. Sometimes a certain love cannot be explained....
Sometimes I like to go smaller than f/1.4 just to ensure I nail focus on off-center compositions, b/c the 5D Mark II AF severely underperforms. And in those cases, I'm stuck with non-circular OOF highlights.
As the OP said, CA at 1.2 is a huge issue. I'd stop down to 1.4 or 1.8 to try and avoid it. but that's my 2cents.
Actually, I've found CA to persist & soften a subject on the side of the frame so much that I have to go to f/2 to equivalent sharpness compared to the Sigma 85/1.4 at f/1.4 (which, to be fair, is more like f/1.6 on the Canon lens).