Sigma Contemporary 16mm f1.4 DC DN for Micro Four Thirds wide angle and the rear element has

and the rear element has an almost invisible coating mark on one edge which won't affect imaging

except for- and I am going to take a few breaths to try to calm down before I continue this description- an ID number engraved on the side of the viewfinder

4x focal length boost

6 is a very wide angle lens

with some cosmetic wear from normal use and handling

Sigma Contemporary 16mm f1.4 DC DN for Micro Four Thirds wide angle and the rear element hasThe Sigma Contemporary 16mm f1. 4 DC DN is a fast, sharp prime lens for Micro Four Thirds cameras. In excellent condition, this lens provides a useful wide standard view that's ideal for day to day shooting (field of view is approximately equivalent to a 32mm lens on a full frame or 35mm camera). In excellent condition, with hood.