Black metal body (no silver ring). Yellow 'EE' marking. Plastic focus grip. This was the latest of five versions, actually slightly heavier than the other four, but all shared the same length and optical design since 1965. The specific lens used for this test was manufactured in May of 1973 (code: 3S).
1971 - 1977
Hexanon - D
Infrared Perfomance Notes
Well, it finally happened - a perfect score... or to put it another way - no hotspot! At least not in the middle of the frame. This lens is famously sharp. Despite having an immaculate copy, I wasn't that impressed with the sharpness wide open. This could be that I am spoiled with extreme quality modern tele lenses, or it could be that this one doesn't adapt well to the full frame mirrorless Sony. It could also be the adapter. I do want to get a nicer one, so will start looking around...