Summary: Used primarily for astrophotography. Have not had a decent, dark night since purchasing but the photos I've taken with a near, full moon have been good. There is a bit of "stretching" of the stars on the edges but easy enough to fix in Photoshop.
Summary: I'm not a pro photographer,but i bought this lens based on the reviews from the professional sites,all what is said about it is true, it is sharp and crisp in most cases and focal lengths,and thefocal length is handy in most situations, i'm waiting to test- it in a real field outdoors ;)
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