Fotodiox Nikon is one of the Pro-series lens mount adapter made with precision and pristine award standard. As all Pro-series adapters, these adapters have been specially crafted to endure professional lenses. No "play" between lens and Camera. With unique styling, the lens mount adapter maintains/enhances professional appearance. This lens mount adapter allows Mamiya 645/M645 to fit on Sony Alpha A-Mount camera body.