Gitzo's top-of-the-range Systematic tripods are modular, with a flat center disk that can be interchanged for center columns, leveling bases and other components. Because they have leg angle settings but no column as standard, Systematic tripods are all capable of near-ground level shooting. Leg tubes are in 6X carbon fiber with Gitzo's efficient G-locks. The GT5542LS is a Gitzo Series 4 tripod designed for strength and torsional rigidity under loads of up to 55lb (25kg) and with lenses up to 600mm. It reaches eye-level height with its long 4-section legs fully extended.