Hello All! I need some advice. I just bought a Tokina 16-50mm f2.8 lens, and I don't know what to make of it. I have a Canon 30D by the way. I was originally going to buy the Canon 17-55mm f2.8 but found out that they suffer from a dust contamination problem, so I chose not to buy it. The counterperson showed me the Tokina, and told me that it would be as good as the 17-55 but without the price and the dust. I brought the lens home, and read a few reviews online, and did some testing in my backyard, and was not happy with the vignetting that was apparent, and it seemed a little soft. I rented a 17-40mm f4L lens during a trip to the mountains, and it took very sharp and beautiful pics. I have taken my best picture ever with that lens, and I'm thinking of returning the Tokina and exchanging it for the 17-40mm f4L I guess the reason for this post is to ask for some more recommendations for wide angle zooms for under $1000.00 and to see what others say about the Tokina 16-50mm and the Canon 17-40mm Thanks!