1. Ari imaging apparatus, comprising: a plurality of imaging elements that each form an image by capturing light passed through lenses; a calculation circuit that calculates, for each imaging element, an exposure time and a sensitivity value, the sensitivity value being a sensitivity of the imaging element to the light, the exposure time being a time in which the imaging element is exposed to the light and the calculation circuit calculates the exposure time based on the image acquired by the imaging element and an exposure area of the imaging element in which the light has passed through the lenses; a memory that stores correction information used to correct the exposure time and the sensitivity value, the correction information including a predetermined exposure time and a predetermined sensitivity value corresponding to the predetermined exposure time; a correction circuit that corrects, when the exposure time corresponds to the predetermined exposure time, the exposure time and the sensitivity value according to the correction information to generate a corrected exposure time and a corrected sensitivity value; a setting circuit that sets setting values to control each imaging element, the setting circuit setting the setting values as the exposure time and the sensitivity value or setting the setting values as the corrected exposure time and the corrected sensitivity value; a control circuit that controls, when the exposure time calculated by the calculation circuit does not correspond to the predetermined exposure time, simultaneous exposure of each imaging element by using the setting value; and an image generating circuit that generates the images acquired by each of the imaging elements.