This perfect lens from 35mm Konvas movie camera fits on regular helicoid with M42 screw mount. 

Allow focusing infinity on Canon and Sony DSLRs via m42 adapter (not include).

Optics is excellent condition no scratches, no fungus, no dust, no haze, no separations, no marks, coating OK.

Aperture works as should, focusing and aperture movies easy and smooth.

Comes with yellow filter, front and rear caps, hard case.