The UBH 35XC Ball Head with X-Cross Clamp from UniqBall is a lightweight 1.2 lb, Arca-type ball head that is suitable to hold large telephoto lenses weighing up to 33 lb. The leveling base levels the horizon, and under the quick release is a lock for the second ball. Therefore, it can function like a gimbal head or pan smoothly like a video head. Releasing the lock completely allows for a pan-and-tilt movement. The bidirectional X-cross clamp has more than one entrance point, enabling lens plates or macro focusing rails to enter straight and camera plates to come in from the side without moving the clamp.