Sigma TS-111 Tripod Socket - includes Screws and Straps for 100-400/5-6.3 DG DN OS Con

The Sigma TS-111 Tripod Socket is a single-locking knob collar that offers more balanced support to select lenses when used atop a tripod or monopod. Once the collar is on, it enables the lens and camera to turn on axis in a vertical or horizontal position. In addition, the dovetail foot on the tripod socket is compatible with most Arca-type clamps.