Product Information This tripod mount ring is made by high quality metal.It mounts on the tripod, help you fix and balance your heavy or long telephoto lens hanging off the front of camera. The main features --Minimum inner ring diameter: 77mm(+/- 1mm); --Ring thickness: 3mm; --1/4 UNC (Unified National Coarse Thread). Suitable for --Canon EF 70-200mm F/2.8 L IS USM; --Canon EF 70-200mm F/2.8 L USM; --Canon EF 100-400mm F4.5-5.6L IS USM ; --Other lens with compatible diameter. |