The Fotodiox Pro Lens Mount Adapter is made for the Leica M Rangefinder lens to work with a Fujifilm G-mount mirrorless camera bodies. With this adapter, you can set focus at infinity and adjust the aperture manually. The adapter allows you to use the aperture priority and manual exposure modes of the camera. Lenses not having a manual aperture ring have their f-stop value stopped down to the lowest limit. When the adapter fits on to the lens, it leaves no gap between them. This metal adapter comes with a chrome-plated brass mount.