The Voigtlander Heliar 15mm f/4.5-L Aspherical Lens and Viewfinder with Leica M Adapter Ring Kit from B&H combines a screw mount super wide angle lens with an appropriate adapter for use with cameras featuring the Leica M mount.
The Heliar 15mm f/4.5-L lens is also paired with a shoe-mounted viewfinder for image composition. The included adapter ring in this kit is specifically designed for 28mm and 90mm screw-mount lenses, but will work with the 15mm as well due to the pre-existing requirement of using an external viewfinder with this lens. A mounting wrench is also included with the kit to ensure the most secure connection.
15mm f/4.5-L screw mount lens paired with a Leica M mount lens adapter; permits usage of the lens on any Leica M mount camera.