Gt5543xls Systematic Ser.5 S4 Systematic is the choice of exacting professional photographers who use long lenses and heavy cameras. Not only are Systematic Gitzo’s strongest and most stable tripods, they’re also modular, with a top casting element that opens and closes to allow each tripod to be configured with a flat disk, geared or sliding center column, video half-ball adaptor, leveling base or other Systematic accessories. The latest range features Carbon eXact tubes, new ultra-stable feet and the Easy Link attachment, making the Systematic even more stable, versatile, and ergonomic. The Easy Link attachment (3/8'' thread) allows the user to attach various accessories such as a Manfrotto arm to use lighting accessories. Series 5 (top leg diameter 41.3mm) is the choice of the most demanding professionals, being the most rigid tripods in the whole Gitzo range. The top casting is larger than that of Series 3 & 4 Systematics in order to provide maximum stability. GT5543XLS is the 4 section extra long model, for users requiring overhead height. It is a new size for Series 5 Systematic.