A camera includes a camera control unit configured to acquire information on an accessory mounted on the camera by performing communication with an accessory control unit included in the accessory and to control a photographing operation based on the information on the accessory. When the camera control unit acquires, from the accessory control unit, first information that is required prior to start of photographing and second information that is required prior to generation of image data after the start of photographing, if the camera control unit determines that a photographer has performed an operation to start a photographing operation during a period in which the camera control unit is performing communication to acquire the second information, the camera control unit executes a photographic sequence in priority to acquiring the second information and thereafter acquires the second information.