Aperture ring has 1/2 value click stops, presented in 2014, only Canon EF and Nikon AI mounts available.
It sports the old looks of a mushroom shaped 8mm circular fisheye and the new finish of least KMZ production, with no plastic or rubber and high quality feeling.
Zenit MC-Zenitar 8mm f/3.5 fish-eye
2020 lens, canon and nikon mounts