For lenses with a 46mm thread. Screws onto the lens with a fluid action thanks to the sturdy construction and aluminum screw thread. The adaptor ring is crucial to the LEE Filters system. It screws onto the camera's lens and, in turn, the filter holder clips onto the adaptor ring. The wide angle adaptor ring is suitable for use with wide angle lenses. It differs from the standard adaptor ring by sitting closer to the front element of the camera's lens. As a result, the likelihood of vignetting is dramatically reduced.