Made like before they started using Chinese steroids
Edward M. "qwntm", Amazon
30 November 2014
Summary: Made like before they started using Chinese steroids... Good enough for professional use and proven durability. I'm using it on a D810, enough said. Very pleased, and glad they still make them.
Excerpt: This lens is spectacular if, and only if, it is shot anywhere from ƒ/8 to ƒ/11 (and the 1/3rd and 1/2 stops in between). That's it. If you plan on shooting outside of that range, expect Chromatic abberation (really bad), very soft focus in the corners, or really bad softness from it being stopped...
Excerpt: I bought my Nikon 20mm f/2.8 AIS lens for night time Astrophotography. When paired with a full body/grip Nikon D800 it's extremely light and easy to shoot with. Hand held shots are easier to perform without shaking. I never tire using this lens. What I like most is it's sharpness and warm colors.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Rugged, Strong Construction