wouldn't right off the tokina, never read a bad review. have had a play with a friends tokina 11-16 f4 version and it's a stunning solid feeling lens. The f2.8 is going to be my next purchase.
Had my fair share of sigma lenses and it's very hit and miss as to whether you get a good copy or not as their quality control is so poor.
Tokina set up by a load of guys from Nikon tend to turn out solid great quality products.
that's my tuppence anyway
