Black metal body with silver ring. Yellow 'EE' markings. Metal focus ring. There are no production codes on the back of this lens as Konica started this process in 1972.
1967 - 1970
Hexanon - B
f/1.8 - f/16
Infrared Performance Notes
This is one of the lower scoring Konica lenses, by many other metrics this is still a good performing infrared lens. There are also a couple of positive notes on the score. Firstly - aperture larger than f/5.6 get extremely good, and secondly - apertures from f/8 onwards do not deteriorate by much. Even at f/16 it does not drop below 8.0, which will provide decent results. There are slightly better performing 85/1.8 lenses out there however, so if this is what you're after the best of this type this may not be the lens for you.