Because with a goal nearly 2kg it is difficult to make good pictures for a long time, the monopod is mandatory, however the screw and unscrew the foot of the lens is quickly tiresome. The Manfrotto ball with quick tray is ideal for this use is very flexible has the advantage of using a plate that I have on a 3D ball joint, which makes them permutation monopod / tripod very fast. A finished locking secures the lens to the ball, no risk of all camera / lens detach. I do not regret my purchase.
