I'm thinking of adding a lens to my current collection and would like an opinion on which would be most useful. I currently have a Canon 7D with the following lenses:- EF-S 15-85mm f/3.5-5.6 IS USM standard zoom EF 100mm f/2.8 USM Macro EF 70-200mm f/4.0 L IS USM I was thinking of adding the Tokina AF 11-16mm f/2.8 AT-X Pro DX to cover the wide angle area but then someone suggested I get a EF 50mm f/1.4 USM prime lens. I use the camera for a wide variety of situations so either lens would get used, but I was wondering if the EF 50 would produce significantly better quality shots than the EF-S 15-85 I already have (at the same focal length)? Any opinions on this would be welcome, as would comments on the quality of the Tokina. Thanks in advance for replies, Mark.