I've got all prime lenses, and I love them. I've got a 30, a 50, a 85, and a 100mm macro, all of which I pair with my Canon 60D (1.6 crop). I want to purchase a wide angle lens to complete my set. However, I could also use a multi-purpose zoom lens... but that's more of a convenience than a need. It would be very nice to have, though.
I was pretty much set on the Tokina 11-16mm until I saw the Tamron 17-50mm f2.8 IS lens. Clearly the Tamron doesn't go all the way down to 11mm, but 17mm is enough for me I would imagine. The Tamron would fulfill my need for a wide angle lens while also giving me the convenience of an all-rounder zoom lens.
My question is performance: how well does the Tamron perform @ 17mm compared to the Tokina @ 16mm?
If the Tamron doesn't perform well as a wide angle lens, I'll stick with the Tokina. If the Tamron does perform well at 17mm, I'll just snag that and knock out two birds with one stone. I would appreciate feedback from those who have experience with these lenses.



