A digital camera includes an image pick-up element which receives light reflected from an object and generates image data of the object, and a light-receiving element which receives light reflected form the object and outputs light-quantity data for the object. The light-receiving element differs from the image pick-up element. In the sequence photograph mode, the exposure amount of the image pick-up element is controlled based on the light-quantity data output from the light-receiving element. In the other modes, the exposure amount of the image pick-up element is controlled based on the image data generated by the image pick-up element itself.