From Manufacturer
The Manfrotto 504HD Fluid Video Head features an innovative design that improves performance while reducing weight, as well as offering a soupçon of style. The head's patented Bridging Technology allows for a wider top plate and longer sliding plate that add stability and balance to a set of state-of-the-art professional features.
With its ability to support up to 16.5 lb, the 504HD can be used with a variety of video and photo cameras. The newly designed counterbalance system includes four presets from 0 to 16.5 lb, enabling proper balance no matter what the camera's size or weight.
At the same time, redesigned variable friction components with clearly marked degree scales and vibration-free movement bring new levels of fine tuning to your tilts and pans. An illuminated leveling bubble keeps horizons from tilting, even in the dark, while independent disc-brake locks make sure the head stays secure when at rest.
Whether you're using a pro camcorder or a highly accessorized video DSLR on a rod system, the 504HD takes some of the strain off your support rig by providing two 3/8" threads integrated into the sides of the top plate. These Easy Link connectors allow attachment of monitors, arms, and other accessories directly to the head, making the camera less top-heavy while reducing setup time.