Fotodiox Lens Mount Adapter (Type 2), M42 (42mm x1 Thread Screw) Lens to Leica M-Series Camera, fits Leica M-Monochrome, M8.2, M9, M9-P, M10 and Ricoh GXR mount A12 Smooth surface for effortless mount Infinity Focus Allowed Anodized Aluminum Construction 24 Month Manufacturer Warranty