Studiohut Metal Tripod Collar Mount Ring for Canon EF 70-200mm f/2.8L, EF 70-200mm f/2.8L IS Lenses Compatible with Canon Camera Lens; Metal construction For Canon EOS 70-200MM F2.8L, EF 70-200MM F2.8L IS lenses Best used with a tripod for stability and ease of use Great accessory for large, long or heavy lens Note: Camera shown in images not included