Just doing some research on the ever popular 70-200 2.8.
I hired a nikon v2 on the weekend and of course loved it. It was so sharp and quick at focusing. I used it to shoot a dance festival/concert in a theatre. The Sigma version (Sigma APO 70-200mm F2.8 EX DG HSM) however seems like a great option at half of the price. Online it gets some reasonable reviews, but I would love to know what AP members think.
Does anyone have one? If so, what are your thoughts on it's quality? Is it only half as good as the nikon?