an image stabilization apparatus comprises a housing accommodating an optical system in the interior thereof . a part of optical members that compose the optical system is held to allow angular displacement relative to the housing , and the position of the part of the optical members is maintained in a predetermined state . the part of the optical members is driven to restore the position angularly displaced . a driving amount is controlled based on information of the angular displacement . a mode for controlling the housing that is suitable for vibration applied to the housing is determined , and the mode is informed to a user .