Patent ID: 8284301

Claim:
A camera body to which a lens unit for forming an optical image of a subject and a flash device for shining light on the subject can be mounted, comprising: an imaging element configured to convert an optical image of the subject into an electrical signal, and configured to produce image data about the subject; a hot shoe to which the flash device can be mounted; and a camera controller configured to calculate an evaluation value on the basis of the image data produced by the imaging element, and configured to perform video autofocusing on the basis of this evaluation value, the camera controller configured to control the imaging element and the flash device so that when the camera controller decides that auxiliary light is needed, and the camera controller decides that the external auxiliary light source of the flash device mounted to the hot shoe is not compatible with video autofocusing, the image data is acquired while an external main light source of the flash device intermittently emits light during the video autofocusing.