1. A digital camera, comprising: a housing provided with an optical lens; an imager provided to the housing and having an imaging surface onto which an optical image of an object scene is irradiated through the optical lens; a measurer for repetitively measuring a rotation angle of the housing; a suppresser for suppressing a change in a positional relationship between the imaging surface and the optical image irradiated onto the imaging surface on the basis of the measurement result; an exposer for performing an exposure processing on the imager every time that the measurement result by the measurer and an angle of view of the optical image irradiated onto the imaging surface satisfy an angular condition; and a capturer for capturing the object scene image generated on the imaging surface according to the exposure processing by the exposer in a memory.