Black metal body (no silver ring). Green 'AE' markings. Plastic focus grip. This, the last of four design versions (mostly external), is 6.5% lighter than the previous three. The specific lens used in this test was manufactured in November of 1974 (code: 4C).
1974 - 1981
Hexanon - D
f/2.8 - f/16
A nice clean lens with very good an consistent hotspot performance. Not as sharp as I would have hoped. I have tested many 85mm f/1.8 lenses sharper and more contrasty (in general) than this, but perhaps some of this is due to it's age or not adapting well to mirrorless. These are minor nitpics however, it's still a very good lens with stellar IR performance.