JJC TR-1 II Tripod Mount Collar Ring for Canon EF 70-200mm f/4L,70-200mm f/4L IS Provide better balancing on a tripod Rotating the camera from horizontal to vertical orientation will be much easier and faster The hinged design allows the ring to be removed without the need to unmount the lens from the camera Flocked interior lining protects your lens from scratch Replaces Canon Tripod Mount Ring A-2, fits Canon EF 70-200mm f/4L IS Lens