Black metal body (no silver ring). Green 'AE' markings. Plastic focus grip. There is only one version of this lens (only D type). The specific lens used in this test was manufactured in December of 1976 (code: 6A)
f/2 - f/16
An exceptionally good infrared performer. This fast, little, old pancake lens can be picked up for very little money currently too, so if you can adapt this to your camera and don't mind focusing manually then it's an amazing option. Although this lens has a slightly longer focal length and minimum focus distance than the Konica 40/1.8 its IR performance is far superior and that lens was already good.