I was bought Tokina 11-16mm f2.8 three months ago, and had it mounted on my Nikon D90 quite a some time for outdoor daytime shoot. I found the images were too soft when i reviewed it on my PC (photoshop 100% cropped), a lot of noise especially in the shaded area. However i don't believe it until i done a simple testing myself with comparison between the others lenses like Nikon 18-105mm f3.5-5.6 and 50mm f1.8..
I was shooting a subject with my SB700 flash on camera, ISO 200, shutter speed 1/60sec, f3.5 and f5.6, in variety distance 30cm/40cm/1meter from the object ; i zoom in all the way in to review each pictures after taken and found both nikon lenses worked well in term of sharpness with less noise, but unfortunately the Tokina 11-16mm end up with noise and soft image.
I didn't believe that but only manage to solve the problem with flash compensation +3EV in term to push the exposure as close as possible to the right of histogram. Does it means Tokina 11-16mm f2.8 works only in sufficient light condition? Anyone of you have this problem also? Anyone can advice?