You can use the for Nikon AI Lens To Leica M Camera
Lens lock / release and stop screw
It is able to focus infinity
Fits to Nikon F mount lens and Leica M mount camera.
Not suitable for DX format lenses.
Auto focus (AF) is not available
1 X K&F Concept for Nikon AI Lens for Leica M LM Mount Adapter Ring NOTE:
If your camera indicated "lens is not properly installed", please modify the camera menu settings.Usually called the "release the shutter the lens is not installed", you can modify the settings to allow. Specifically refer to the camera manual.