Yourlensreview - Lens - Tokina 12-24 F/4 ATX Pro DX

Absolutely sharp, great to work with.

Slightly slower AF, no USM. And f/4, but great lens to work with.

I was looking for a wideangle lens for 1.6 crop, and looked into the tests, this was the one I needed. And it just suites perfectly

Wonderful price/quality trade off. Though this lens costs about 430 euro, it's well worth it.
Sharp throughout f-stops and focal lengths (a little less at the end of 12mm F4, but still sharp enough too satisfy almost anyone except Ken R. maybe)
Even usable on my F5 (until about 18mm)
Build like a rock!

Not much really. Maybe a bit too expensive.
How about 1 or 2 mm more guys?
Maybe not as sharp at F4, 12mm as it should, but is definitely sharpen than the Nikon equivalent.

This lens was purchased after I tried the Sigma 10-20, which is a very decent lens as well, but I like my constant diafragma. Lovely for architecture and landscaping.

All in all, with the build taken into account and the price/quality balance this is one of my favorites.