Excerpt: I bought this lens for my Alaska Trip, the advantage of this lens over 12-24 mm is that it provides extra 4 mm which can sometimes come handy. It is very sharp and auto focus also work great with Nikon d7200. I am loving it so far.
Pros: Consistent Output, Fast / accurate auto-focus
Excerpt: This lens was purchased for landscape work and the first images are absolutely stunning! I shoot with an APS-C sensor and sharpness across the frame is great--really great. Even shooting with the sun peaking through in some frames, I see little to no flaring.
Pros: Breat Built Quality, Fast / accurate auto-focus, Image quality
Summary: Nice overall results. I went with this one after reading reviews and specs on Nikon and other Tokina options (11-16mm). I chose the 12-28mm Tokina because it offers a bit more possibilities and versatility (28mm side) than the 11-16 option.
Summary: A very good lens. I've learned that NO ultrawide, or even a lower-end regular wide lens, will perform well for strongly backlit scenes. Even so, I've been able to rescue with a little bit of Lightroom work some really badly blown-out scenes taken with this lens. As the reviews state, it is sharp.
Summary: After spending a couple of months researching which ultra wide angle lens I wanted, I decided to go with this one. I chose this one over Tokina's 11-16mm only because this lens can extend to 28mm, which is a very flexible range from ultra wide to wide ( 24 mm being one of my favorite ranges).