03-15-2011, 06:02 PM
I have the Tamron. It's very, very sharp. I also have Canon 17-55 and the Tamron easily holds its own with respect to sharpness.
As for testing. Don't try a hurried test in the store. It will tell you nothing. Most shops have a return policy (1 day, a few days, a week). Ask about it, then take your lens home and test it properly, on a tripod, with live-view, being 100% certain that you're perpendicular to the wall, etc.
As for testing. Don't try a hurried test in the store. It will tell you nothing. Most shops have a return policy (1 day, a few days, a week). Ask about it, then take your lens home and test it properly, on a tripod, with live-view, being 100% certain that you're perpendicular to the wall, etc.