« on: August 27, 2012, 01:10:16 PM »
My buddy has a 17-40 and he is pretty harsh with it. The color saturation is great, its rugged, and contrasty. He says the weather sealing is great. When I was looking at lenses these were too expensive. I bought a sigma 17-70 2.8-4 OS and kinda wish i got the 17-40L. I do like the IS on my lens, and it is a stop faster on the wide end, and I have alot of fun with it at 17mm with IS on at night. You can get sharp 1/4 second shots. The 17-70 seems to be hit and miss with autofocus being front-focused, but your 7d has AFMA so that is probably not an issue for you.