The Golden Eagle Contax G Lens to Sony NEX Camera Lens Mount Adapter Mark III from DEO-Tech attaches a Contax G lens to Sony NEX (E-mount) cameras, including cameras with full frame sensors. The adapter retains electronic communication between the camera and lens and enables automatic aperture control and autofocus. The adapter is powered by the camera body, so no external power source is required. The Mark III version of this adapter has optimized stability to reduce "black screen", improved autofocus speeds and offers a Bluetooth 4.0 wireless firmware upgrade module for easier firmware updates. It provides a solid build and a fine finish with a smooth lens release.
The NEX-C3 and NEX-5 cameras and Contax G Zeiss Vario-Sonnar T* 35-70mm f/3.5-5.6 and Contax G Zeiss Hologon T* 16mm f/8 lenses are not compatible.