JJC TR-1 - foot clamp type A II (W) for Canon EF 70-200mm f / 4L EF 70-200mm f / 4L IS (Accessory)
a little fragile aspect, does not serve the purpose completely and if we force it can come loose. MOST IMPORTANT is that if you own a 70D with grip, perso I was unable to fix it on my Manfrotto tripod with a 3D ball. So, returned to Amazon and thank