Product picture - Formatt Hitech Canon EF 100-400mm f 4.5-5.6 L IS II USM Adapter Ring for 100mm Lucroit Holder Formatt, Hitech, Canon, EF, 100-400mm, f, 4.5-5.6, L, IS, II, USM, Adapter, Ring, 100mm, Lucroit, Holder Click the image to close this page