1979 KMZ Helios 44M 58mm f/2 prime lens. M42 screw mount
One of the finest lenses to come out of the Soviet Union. Okay, it's a copy of the Zeiss Biotar, but they still had to make them.
Auto aperture lens. Will function as a manual aperture lens on a DSLR
Focus is smooth. Aperture blades are snappy
There are a few internal dust specks which have zero effect on the image
Complete with original KMZ front cap