An imaging apparatus includes: a focus controller configured to adjust focus by driving a lens; a relative tilt angle controller configured to incline a focus surface by controlling a relative tilt angle of the lens to an image sensor; and an acquisition unit configured to acquire an installation angle of the imaging apparatus based on a relative tilt angle and a distance from a standard surface on the focus surface inclined in accordance with the standard surface. The acquisition unit acquires a relative tilt angle when the focus surface is inclined in accordance with a height of a subject based on the installation angle and a distance between the standard surface and height information of the subject, and outputs the relative ti It angle to the relative tilt angle controller.