The TS-111 Tripod Socket Kit from Sigma is designed specifically for the 100-400mm f/5-6.3 DG DN OS Contemporary Lens for Sony E, Leica L, FUJIFILM X. The kit is compatible with Arca-type platforms and clamps, and once the collar is on, it enables the lens and camera to turn on axis in a vertical or horizontal position. Additionally, its exclusive protective cover makes the lens easier to carry and use when shooting hand-held.