Summary: When zoomed out to 17mm, the rear element of this lens can block the return path of your camera's mirror! I did this a couple times on my D750 before I realized what was happening. What I observed was that aft er taking a shot, the mirror would get stuck in the up position.
Monumental design failure, or did I get a dud lens?
Rolf H Gibbs, Amazon
8 September 2014
Summary: On my Nikon D600, when I open the lens up to it's widest (17mm), the inner lens actually touches the camera mirror and stops it from closing again after taking the shot. If I want to see through the viewfinder again (for example to take another picture!
Excerpt: I have been wanting a wide angle zoom for a couple years but have never really wanted to dump the money on a Canon L lens. I thought that this lens would be the ticket, it's not. This lens has been nothing but problems.
Pros: Nice Bokeh, Sharp Focus Sometimes, Very sharp images
Excerpt: I was a fan of Tokina 11-16DX lens and had it in my bag for years. So I did not hesitate to buy this one after FX upgrade. I was pleased with build and image quality for all 35 days I used it. Only to find it broken last Friday.
Pros: Image quality, Profile In Lightroom4, Strong Construction
Excerpt: I have a 11mm-16mm Pro II from Tokina and have loved it. Upgraded from DX to FX and had to have similar lens for full frame. Having loved my DX Tokina I did not hesitate to try an FX version. Tried for about 30 pictures on a hike and could tell it was fuzzy or soft just from view finder.
Summary: I can't believe that a lens can be this horrifically soft. I used to rock the Tokina 11-16 EF-S on my Canon 7D and it was pretty good. Not the sharpest, but definitely passable for the price and ultra wide angle with minimal distortion.