Summary: this is definitely a macro lens. I tried to pull it off as a sports lens, but using rapid fire shutter on this wasn't the greatest. sigma makes great lenses - used it for some portraiture too, that worked a lot better than using it for sports.
Summary: Just bought this lens after using a Canon Non IS version of this lens. The only thing that is different in a negative way is the autofocus. The Canon lens does focus faster, but, not a very noticeable amount. This lens focuses fast enough for me, but I trust the Canon more.
It'll be 5 stars if it wasn't for the problems with the Autofocus which seems to be a frequent problem
Roger Sandoval, Amazon
12 July 2014
Summary: It's an amazing lens, however, I had a problem with the AutoFocus (which has been mentioned in several forums over the Internet) and it happened to me as well. I send it back to Sigma and they fixed it. I had to incur in additional charges which doesn't make me very happy.
Summary: I ended up selling mine because I decided to buy the Canon 70-200 2.8 IS. Although Canon's is better, it's certainly not TWICE as good. If you can find a good used one, save a few hundred dollars, that's the way to go.
Summary: Quite frankly i didn't want to spend the money for Canon L glass. I do own several L lens and they are why you spend the big $$. This lens works very well and quality will amaze you. No regrets here.
Summary: in my professional opinion...the Sigma 70-200mm f2.8 APO EX DG HSM OS FLD telephoto lens is a fantastic performing lens...It's very sharp on both my 5D Mark III & 7D...bokeh is creamy & very pleasing...the focusing seems to be as quick if not a little faster than the Canon version 1 lens..