Camera system

摘要

There is disclosed a camera system consisting of accessories such as a speed light, a data back etc. and a camera capable of mounting these accessories, and capable of data communication between the camera and the accessory. When the power supply of the camera is turned off, a power supply activating signal is sent as a hardware signal from the accessory to the camera by the manipulation of the accessory. When the power supply of the camera is turned on, a power supply extending signal is sent as a software signal from the accessory to the camera by the manipulation of the accessory. The camera holds the operation of the power supply for a predetermined period from the latest entry of the power supply activation signal or the power supply extending signal.