Excerpt: I bought this lens because I was lacking the focal range and wanted to compliment a 70-200vr w/o breaking the bank. I really wanted the nikon 24-70 but could not justify the price. I've been using it as a portrait lens, action shots for wide angle and general walking around glass. Feels solid.
Summary: Good lens that we use for general purpose photography. A little slow on focusing, and not quite as good as the similar Canon in focusing in low light. It seems to give a sharper image on my full frame 5DII then my crop sensor 7D.
Sigma 24-70mm f2/8 IF EX DG HSM AF is a lens I would recommend for all sorts of photography.
Michael A Kovach "Some one who enjoys fiction, especially space based. I also enjoy historical books, and documentaries.", Amazon
17 November 2013
Summary: Having this lens for the past month and out on several shoots I have been very pleased with the performance, sharpness, and captured light. What I have experienced is this lens has some issues on a full frame camera with chromatic aberration and lens flare.
4 out of 5 ONLY because it's not a Canon product, everything else is 5 Stars!
Lea Ann Branch, Amazon
13 October 2013
Summary: I've owned several Sigma lenses because THAT was what I could afford. I was never completely happy with the clarity they gave me, that is until now. This 24-70 2.8f lens is awesome clear! I'm using it on my Canon 6D and love the results.
Excerpt: Of course the "gold standard" for a lens in the 24-70mm range is the Canon 24-70mm f2.8 Series II but for some of us it's price is prohibitive. The Sigma 24mm-70mm f/2.8 EX Aspherical IF EX DG HSM Lens for Canon is a viable choice as are the samples from Tamron and Tokina.
Summary: Worth every penny! I've taken some great shots with it on my D7100. One small issue is with the exposure meter using this lens. It's not accurate so what appears to be slightly underexposed via the camera meter actually isn't. I only have this issue with this lens.