The phot r vt 3510 video head is a lightweight head the video head has a sliding plate which you can use to balance interchangeable lens cameras it allows you to make smooth controlled and precise movements of the video head so your videos are perfect it also has a built in spirit level so you always know whether or not the head is level so your videos come out steadythe vt 3510 has a quick release plate that comes with both a 14 and 38 mounting screw which allows the head to be compat