ARCA-SWISS monoball Z Stronger, lighter A leader of tripod head design for over 40 years, ARCA-SWISS is setting new standards revisiting their B-series models and introducing the Z-Series, just as elegant, and even more perfect. The size and weight of the ball heads have been significantly reduced. The ball and fastening are now assembled using a patented bayonet mount. Various accessories can thus be quickly mounted to adapt the tripod as required. In addition to the proven, patented Arca-Swiss features, including aspherical ball heads, axial clamping and PMF (progressive motion related friction control), the Z-Series also boasts new technical developments and optimized materials and coatings. The new series can withstand an incredible 60 kg (122 lbs) off-axis. Z-Series heads are available as Version Z SP (single pan) and Version Z DP (double pan). The monoball Z DP with its second panning mechanism below the camera mount keeps the camera perfectly vertical to the swinging plane, for perfect panoramic stitching of multiple images.