Gitzo Ground Level System

What is Gitzo Ground Level System? For low angle shooting, the center column can be removed and the upper disc fitted directly to the tripod top casting. the disc is locked into position using the retrsctible column hook. The ground level configuration can be achieved in a few seconds without tools or extra components, and only the column need be removed. With this effective and simple built-in solution we like to think we've dramatically increased the ways you can use the tripod.