<p>An imaging apparatus includes: an illumination optical system including a light source and guiding the light from the light source to an illuminated surface B including an object; a plurality of image sensors for acquiring an image of the illuminated surface formed by an imaging optical system; a measurement unit for measuring a size of the object; and a control unit for determining an image sensor to be used when acquiring the image of the illuminated surface, among the plurality of image sensors, based on a measurement result of the measurement unit.</p>
