24/2.8 was tested by SLR Gear on 5D to be pretty underwhelming (http://www.slrgear.com/reviews/showprodu.../82/cat/10) but I think this has more to do with the fact that it's a bargain bin lens so the poor results are unsurprising. I think a good modern zoom like 24-105 slays it every day of the week for everything except maybe distortion.
Guess a recently tested Sigma 24/1.8 might make more sense.
Guess a recently tested Sigma 24/1.8 might make more sense.