iShoot IS-C720XXB tripod mount ring (metal) is only designed for Canon EF 70-200mm f/4L USM, Canon EF 70-200mm f/4L IS USM, Canon EF 400mm f/5.6 L USM and the Canon EF 80-200/2.8L lens. The tripod mount ring also features a arca-type interface so it can be mounted directly on any standard arca-swiss compatible ball heads or clamps ( IS-JZ30, IS-JZ50, IS-JZ64, IS-QJ58, IS-QJ64, IS-QJ64-FD, IS-JZ60BK, IS-JZ70MFT, IS-JZ80BK).By using a tripod mount ring you can normally get better stability and therefore get better pictures, for the mount ring provides a better balance and stabilisation.
1 x iShoot C720XXB Tripod Mount Ring for Canon 70-200 f/4 USM, 70-200 f/4 IS USM