The manfrotto 500 pro fluid video head with 60mm half ball is a lightweight head with large platform base and is suitable for hdslrs weighing no more than 5kg this entry level 500 fluid head is supplied with a 60mm half ball video tripod mount which ensures smooth shots and fine control of your camera the side lock system allows the camera and sliding qr quick release plate to click quickly into the head from above instead of needing to be aligned and slid in from the back the 500 has a pr