One of the most appealing aspects of small mirrorless cameras like the Sony NEX-3 and NEX-5 is the availability of a wide range of interchangeable lenses, including non-Sony lenses. This Novoflex Adapter for Leica M Lens to Sony NEX Camera makes it possible to mount a Leica M lens to your NEX-3 or NEX-5 camera with a precision mechanical adapter. Such an adapter does not transfer functions from the camera to the lens, such as auto focus, but automatic exposure metering (stop-down metering/aperture priority) is possible. The lens will focus to infinity using this adapter.