An optical apparatus is capable of achieving reduction in noise caused by lens driving and reduction in size. The optical apparatus includes a main and a movable housing member which houses a lens movable in a direction of an optical axis. The housing member is movable in the optical axis direction between a first position where the movable housing member is retracted in the main body and a second position where the movable housing member protrudes from the first position. Further, the apparatus includes a first actuator which moves the movable housing member between the first position and the second position, and a second actuator which moves the lens with respect to the movable housing member.