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.
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: Before taking on a military contracting assignment in Korea - I purchased a Canon 5D Mark II fitted with this SIGMA lens. Like others - I decided not to purchase a more expensive Canon 'L' series with similar specs - as I wasn't sure what conditions the camera and lens would be exposed to - as well...
Summary: I've been using this lens for about a month now. I've had the opportunity to shoot a couple of events with the lens and have been very happy with the results. I did consider spending the extra money and acquiring the very desirable Carl Zeiss 24-70 F2.8 but decided I would give this lens a to see...
Summary: The absolute only down side to this lens is it does not have image stabilization. But if you have a very steady hand, or just make sure to shoot with a tripod it's amazing. I gave it 4 stars because it doesn't have image stabilization.