To suitably supply electric power to a load of the camera side from the power source of an external device by having a communication means to execute communication of information between the external device and the camera and by transmitting information regarding the power supplying ability to the camera.

The camera 10 capable of being connected to an external device 20 for camera has a communication means 12 to execute communication of information between the external device for camera, a means 16 to be supplied with electric power capable of being supplied electric power from a power source 23 of the external device for camera, and an electric power limiting means 17 to limit the power supply amount to the means to be supplied with electric power by receiving information relating to the power supplying ability of the power source of the external device for camera transmitted from the external device for the camera via the communication means. Consequently, extension of the life of the camera battery by supplying electric power to the camera from the external device, and to assure a normal operation at the camera side by limiting the electric power supply even if the electric power supplying ability of the electric power source is insufficient or the like become possible.