Fotodiox M42 Rear Lens Cap for 42mm thread lenses, 42mm x1 Screw Mount
This fine rear lens cap is exclusively made for 42mm x1 (M42) screw mount lenses. The M42 rear lens cap is made of quality high impact plastic. This easy to attach rear lens cap gives sturdy protection for the rear elements of the M42 screw mount lenses when not in use.