Vello TC-AWC Tripod Collar A with Arca-Type Foot for Select Canon EF Telephoto Lenses (White)

The TC-AWC Tripod Collar from Vello is an easy-to-use tripod collar that's made specifically for the Canon 200mm f/2.8, 70-200mm f/4, and 400mm f/5.6 lenses. The collar improves stability by redistributing the camera and lens weight. Rotating your camera from vertical to horizontal orientation is fast and effortless, and the vertical and horizontal marks on the ring assures that your camera is always in perfect alignment.