A camera module (100) includes a lens unit (20), an image sensor (80), an optical group (406a, 406b), and at least a first light directing unit and a second light unit directing each having two reflective surfaces. The optical group includes a first reflective surface facing the lens unit and a second reflective surface facing the image sensor. The reflective surfaces of the first and second light directing units are positioned corresponding to the first and second reflective surfaces of the optical group. A distance between the first light directing unit and the optical group is different from that between the second light directing unit and the optical group. The optical group is movable relative to the first and second light directing unit. When the optical group is moved to different positions, light from the lens unit is directed to the image sensor in different path.