Camera system for a vehicle, comprising: - a holding device that can be fastened removably to the outside of the vehicle, and - a camera that can be fastened removably to the holding device, characterized in that the holding device comprises an accumulator and electrical energy can be transmitted wirelessly from the accumulator to the camera to operate the camera, wherein the camera and the holding device can be arranged, when in a state ready to operate, at a distance from one another, and wherein the camera system comprises a cable connection between the camera and the holding device for transmitting the electrical energy, so that the camera can be fastened at a first position and the holding device can be fastened at a second position at a distance therefrom, and wherein the camera system comprises a further holding device that can be fastened permanently to the vehicle and that can optionally be coupled to the holding device and the camera, wherein, if the holding device, that serves to supply electrical energy, and the camera are arranged at a distance from one another, the further holding device can be fastened at the first position, so that the camera can be fastened to the vehicle by means of the further holding device, and wherein the holding device and the further holding device are connected to each other by the cable connection, wherein the cable connection serves to transmit electrical energy from the accumulator of the holding device to an energy transmitting device of the further holding device, wherein electrical energy can be transmitted wirelessly from the energy transmitting device to an energy receiving device of the camera for operating the camera. - a holding device that can be fastened removably to the outside of the vehicle, and - a camera that can be fastened removably to the holding device, characterized in that the holding device comprises an accumulator and electrical energy can be transmitted wirelessly from the accumulator to the camera to operate the camera, wherein the camera and the holding device can be arranged, when in a state ready to operate, at a distance from one another, and wherein the camera system comprises a cable connection between the camera and the holding device for transmitting the electrical energy, so that the camera can be fastened at a first position and the holding device can be fastened at a second position at a distance therefrom, and wherein the camera system comprises a further holding device that can be fastened permanently to the vehicle and that can optionally be coupled to the holding device and the camera, wherein, if the holding device, that serves to supply electrical energy, and the camera are arranged at a distance from one another, the further holding device can be fastened at the first position, so that the camera can be fastened to the vehicle by means of the further holding device, and wherein the holding device and the further holding device are connected to each other by the cable connection, wherein the cable connection serves to transmit electrical energy from the accumulator of the holding device to an energy transmitting device of the further holding device, wherein electrical energy can be transmitted wirelessly from the energy transmitting device to an energy receiving device of the camera for operating the camera.