The Induro GHBA GH-Series Aluminum 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. It includes an Arca-Swiss compatible Quick Release Plate. It fits Arca-Swiss compatible QR Clamp on a heavy-duty ballhead.