Designed to be used on our 055 series tripods our innovative system means you can quickly level your photo or video head without needing to make time consuming adjustments to the length and angle of each single tripod leg one of the most common problems in still photography and above all video has been resolved by manfrotto thanks to the use of a 50mm diameter levelling half ball mounted at the top of a tripod centre column so as to make the angle of the top plate independent of the rest of