Fotodiox Pro Lens Mount Adapter Compatible with Mamiya 645 MF Lenses on Pentax K Cameras Compatible only with Mamiya 645 Manual focus lenses (not designed for Mamiya 645af or Phase one lenses); works with Pentax K cameras Enhanced craftsmanship and high-tolerance construction for demanding professionals Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required Precision all-metal construction with chrome plated brass mounts for secure and solid fit Limited 2-year Manufacturer