The S-Adapters enable the use of third party lenses with the Leica S camera. More specifically, it's the Leica S-Adapter M645 for Mamiya 645 system lenses. When using the Leica S adapter, no mechanical or electrical functions, signals or data are transferred between Leica S system cameras and lenses.
to use on Leica S cameras
Adapter for Mamiya 645 system lenses