Motorized monopod Fotopro NRA 55 very practical, this ball filled his role perfectly and is more convenient than rotuleball in my case (450D DSLR + 2X + kenko sigma 120/400). Indeed with rotuleball, it was necessary to keep the unit not to err. Here just before rocking back well enough. In addition the board is the same as on the ball of my 128RC tripod big telescope, I can spend it with the reflex in a nod. The quick release plate is still as practical and reliable. The quality manfrotto for thirty euros ... why look elsewhere?
