An adapter device is disclosed to which a video camera can easily be attached. The adapter is compatible with both small and large camera lenses which may be attached directly to it. The adapter includes a receptacle which enables the video camera to be located within the adapter after being inserted through a rear opening. Once inserted, the adapter includes both mechanical and electrical connections to enable the camera to be connected to the adapter. A key mechanical connection is located at the front end of the adapter and it interfaces with a lens-unit mount of the camera. The electrical connection is located on the bottom inner surface of the adaptor and the connection interfaces with a terminal block on the video camera.