Abstract: This invention provides a tool for tightening and loosening lenses with respect to camera bodies. The tool includes a body that defines a cavity that is slightly larger in diameter than the sidewalls of the lens adjacent the lens face. Within the cavity is a thin, high-friction, elastomeric material that resides between the edges of the lens when the cavity is pressurably engaged over the lens face. The material frictionally couples the tool body to the lens face and adjacent side walls, thereby allowing a predetermined level of torque to be applied to tighten or loosen the lens. The tool can be adapted for attachment to a handle, such as a torque wrench or can include a handle specifically adapted/contoured for grasping by a user's hand.