Manfrotto Tripod and Head Chooser The 808RC4 replaces the 3047 and 329RC4 and features the new Double Axis Spring System, which consists of a built in 3.31 lb. spring for both the front-tilt and side-tilt movements. This solution, borrowed from the video industry, helps to move smoothly the camera while framing the picture as it negates some of the camera weight. Moreover it absorbs the shock of bodies and lenses when reaching the end stop of the head movement. Should this feature, in view of the extreme lightness of the camera and lens combination use, disturb the shooting session it is always possible to exclude one or both springs by two separate knobs. Features:Handle ergonomically designed for superior gripON/OFF selector for balance spring FRONT TILT movementSafety SpringON/OFF selector for balance spring SIDE TILT movement.