Gitzo GH4383QD Series 4 Center Ball Head with Arca-Type Screw Knob QR ReceiverThe Gitzo Ball Head Series 4 GH4383QD (screw version) is a heavy-duty tripod head ideal for large telephoto lenses, engineered to ensure the ultimate in smoothness and precision of movement. Though weighing-in at less than 1kg, it securely holds an impressive 30kg load \u2013 effortlessly handling a CSC or DSLR equipped with a 400-600mm lens. The unit perfectly complements Gitzo\u2019s Series 3, 4 and 5 Systematic tripods and is available in both lever and screw plate lock configurations.\nThe Ball Head Series 4 has a larger super-smooth coated hollow-sphere ball ensuring confident and comfortable use with heavier equipment, even in extreme conditions and temperatures from -30\u00B0 to 70\u00B0C.\nIt is rich in features: a friction control for precise adjustment and a bubble level to help keep a true horizon. A 360\u00B0 independent panning lock provides uncompromisingly smooth movement in a fluid cartK