Patent ID: 8810717

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 connected, the flash device having an external auxiliary light source, the camera body comprising: an imaging element configured to convert an optical image of the subject into an electrical signal, and configured to produce image data for the subject; a hot shoe to which the flash device can be connected; and a camera controller configured to calculate an evaluation value on a basis of the image data produced by the imaging element, and configured to perform video autofocusing on a basis of the evaluation value, wherein the camera controller is configured to control the flash device so that the external auxiliary light source emits light while performing the video autofocusing when the camera controller has determined that auxiliary light is needed, the flash device is connected to the hot shoe, and that the external auxiliary light source is compatible with the video autofocusing, and when the camera controller has determined that the external auxiliary light source is not compatible with the video autofocusing, the camera controller performs the video autofocusing (i) using a light source other than the external auxiliary light source or (ii) without using the external auxiliary light source.