Methods and apparatus provide for controlling an operating device, where the operating device includes: (i) a grip part to be gripped by a user; and (ii) an operation part for activation by a finger of the user gripping the grip part, and where the operation part includes: (i) a movable part capable of moving from a resting position toward another position in response to a force applied by the finger of the user, (ii) a biasing element operating to urge the movable part toward the resting position, and (iii) a motorized assembly operating to receive a drive signal and apply a force to the movable part in an opposite direction of the force applied by the finger of the user.