Abstract: A novel digital camera module includes an image capture device, a lens unit, a housing for receiving the lens unit and positioning the lens unit with respect to the image capture device, and a focus mechanism disposed on the outside of the housing and operative to move the lens unit along an axis when the lens unit is rotated about the axis. In a particular embodiment, the focus mechanism includes at least one ramp formed on the housing and at least one complementary ramp formed on the lens unit. In another embodiment, the focus mechanism includes a thread set formed on the outside of the housing for engaging a complementary thread set on a sleeve of the lens unit. In still another embodiment, the focus mechanism includes an inclined groove formed on one of the housing and the lens unit, and a groove follower disposed on the other of the housing and the lens unit.