The GHB2 carbon fiber gimbal head is ideal for very long, heavy telephoto lenses used in sports or bird/nature photography. Vertical and horizontal tracking of fast moving objects is quick and easy. And balancing a camera/lens system on a gimbal head makes it essentially “weightless” providing freedom of movement not possible with any other support system. All heads include an Arca-Swiss compatible Quick Release Plate. Fits Series 3 & 4 Tripods.