Product picture - Vello Tripod Collar A for Canon 200mm f 2.8, 70-200mm f 4 & 400mm f 5.6 Lenses Vello, Tripod, Collar, Canon, 200mm, f, 2.8, 70-200mm, f, 4, &, 400mm, f, 5.6, Lenses Click the image to close this page