If an when I expand my lens quiver, I'm thinking about getting the Sigma f/2.8 17-70 in addition to a Tokina f/2.8 11-16 and probably an f/4 70-200L. I would get the Tamron 17-50, but I want to be able to fill in the 50-70 range.
Has anyone ever used this lens? Seems to get decent reviews on B&H.