What do you mean? I've got one that has a fault linked to the zoom. At certain focal lengths the displayed aperture is f1, and when you take a picture, it doesn't stop down. It you were trying to use an aperture other than f4 that means underexposure in auto, overexposure in manual.
Anyone used the 11-16 2.8 tokina yet?
No, it was fucked when I got it, but as the first thing I did with it was take it big-walling I never returned it. That was a mistake. Proper wide starts at 16 word.