I am convinced of the patent, wirklcih great product. with a handle, a slight rotation of the camera sit this snapped. then the button is still pressing in slightly and already holds a large pressure Camera bombproof and without wobble with the tripod head connected. solve the accidental is effectively prevented by a 2 sicherungshelbel. the water I dare banutze though hardly, but with them can be ide camera Align sher exactly.
I have the coupling insert on a Pentax K20D and various objective on until 300/4, and it keeps everything very well. at größren equipment but I would already suggest the L variant. the annoying video am I simply unscrewed.
made entirely of aluminum. solid workmanship, convinced me. I immediately bought 3 units and so everything (including panorama head.) brought to a standard, I can only recommend.