Pendulum ball BK-45 Beike Really perfect for my Canon EF 400mm f5.6 TV L and Canon EOS 70D. The operation is really easy, I find this very flexible and soft ball (surprised after reading the post on the subject) and if you want + hardness, simply tighten a little stronger brakes screwing axes of control . The construction is really solid, reassuring to the housing price and great TV; To use it you need a long lens and a necklace. Mounting directly on the case is delicate and not balanced. I use a foot Manfroffo CX055PRO3. Excellent and with a Super + which is the price quite reasonable.