SHOTEN Mount Adapter PK-LM R50 (Pentax K Mount Lens To Leica M Mount Adapter) with Rangefinder-Coupled Helicoid

The SHOTEN R50 series is a mount adapter that converts 50mm focal length lenses into a rangefinder-compatible M-mount lens. Features: Compatible with M-type cameras (50mm focal length lenses only) | Shortens the lens's minimum focusing distance using a helicoid (when focusing using Live View) | Allows fine adjustment of the rangefinder coupling mechanism | Durable brass mount parts on the lens and body Compatible Lens Mount: Pentax K (DA lenses not supported) | Compatible Camera Mount: Leica M Manufacturer's Warranty: 1 year (covers natural failure) Note: The lens cannot be electronically controlled. Please use a lens whose focus and aperture can be adjusted even when the lens is detached from the camera. | The rangefinder will not function properly with lenses other than 50mm focal lengths. | When attached to a few film cameras, such as the Leica M2/M3/M4, interference with the lens release button may cause very light scratches.