3 out of 10 points and not recommendedSharp,Serious Front/Backfocusing Problems, CA
I use a Nikon D90 and did extensive reading and finally settled on this lens because it was prolly the most bang for buck around, with a good reach to compliment my 24-70mm f2.8.reviewed August 21st, 2009 (purchased for $570)
Bought this lens and upon testing it, it was pretty apparent that there was backfocusing. Even at f4 the effect was very obvious. Shot almost 40 shots using different angles, different subjects but all ended up with the same result. Tested another copy of the lens and that too had focusing problems. Am now waiting for new stocks to arrive before sending this back to change for a new copy that hopefully doesn't back/front focus.
From initial observations, there's CAs too... although seems controlled and acceptable to a certain degree.
Image is sharp.... but again that's subjective.... because whatever I aim for isn't coming out sharp due to the backfocusing, and something else is instead.
For comparisons purposes, I slapped on a 14-24mm f2.8 Nikon, shot at f2.8, and got on-the-dot focus accuracy.
You get what you paid for I guess.
The Quality Control associated with the Tokina lenses are seriously crap.