An endoscope including a shaft having a deflectable distal end; a handle at a proximal end of the shaft; and a deflection control connected to the distal end. The deflection control includes a combined lock and deflection control member at the handle. The control member is adapted to be moved to a selected location by a single finger of a user and thereby deflect the distal end. The control member is adapted to be locked at the user selected location by movement of the control member to a locked position by the single finger of the user.