Addendum: I use the ball head now also in combination with a lighter Mirrorless equipment (Fujifilm X-E1 and Sigma 150mm F2.8 Macro with tripod socket). Unfortunately evident in this very combination ausbalanzierten another problem. When tightening the locking screw the camera position changed slightly. This manifests itself in a macro telephoto by a significant shift in the cropping noticeable. I had first thought, my mistake, but then saw similar reports. Quintessence, I'm still looking for a good lightweight ball head.