Asahi 35mm f3.5 Super-Takumar  type_Instant Black & White but it's usable as it

but it's usable as it is and it's got good bones if you feel like polishing it up

"15" is sort of related to the word "Rams"

and motor in the standard OM mount

This original Asahi Y2 yellow filter is a slip-on design with a tightening screw

to Fit Hexagonal (RC0) Q

Asahi 35mm f3.5 Super-Takumar &nbsptype_Instant Black & White but it's usable as itAsahi 35mm f3. 5 Super Takumar lens in decent cosmetic condition, with some paint and finish wear on the barrel. Minor internal dust, no haze or fungus. A tiny wide angle lens for M42 mount. Be aware that this lens can be used on adapters, but the long rear flange will interfere with full frame SLR mirrors so keep it away from your 5D.