Black metal body. Green 'AE' markings. Rectangular locking button. Plastic focus ring. This is the second version, a compact redesign, made by Tokina. The specific lens used in this test was manufactured in November of 1981 (code: 1C).
1980 - 81
Hexanon - E
f/2.8 - 22
Mostly shot at f/8 the below samples show good performance, but also an obvious problem in the last image where a particularly high contrast scene shows off a blot in an otherwise nice dark sky. This reflects the stress test pretty perfectly. It's a good lens, but not great. This is by far the worst performing Konica prime lens that I have tested (I almost have them all now). You can avoid most of the bad here by not stopping it down further than f/5.6, but that is unfortunately where the good corner sharpness is. I really wish it was better because, like the 21mm, it's really small and light... oh well.