Leitz Summicron 5cm f2 lens mount_M42 Good shutter speeds and metering

Good shutter speeds and metering

but Nikon made less than 500 of them between 1983 and 1988

That's about all it does

These fit over the narrow control knobs on early model Calypso and Nikonos lenses for a larger gripping surface

I'm assuming that this was the absolute cheapest lens that it was possible to make

Leitz Summicron 5cm f2 lens mount_M42 Good shutter speeds and meteringLeitz Summicron 5cm f2 lens for Leica M mount in very good condition overall, with minor cosmetic wear on barrel, smooth focusing. Glass shows minor dust, a few small (< 1mm) spots of coating wear on the front element which will not affect function. This lens has just come back from a professional CLA.