✪T6061 aerospace grade aluminum, weighing only 12.7oz(363g). Load capacity reaches as much as 33lb(15Kgs). Suitable for heavy and long telephoto lenses for shooting subjects in motion and bird watching. | ✪Dual-lock knob on left and right side of the head, it can be locked by eiher one side or both sides, easy to operate. With both knobs locked, it reaches max locking strength and highest stability, ensuring the head is well balanced both sides and it also extends the longevity of the head. | ✪The panning base is 360 degrees rotatable, steadily and smoothly; it can also be locked to avoid accidental shifting of the camera/lens which might influence focusing. Scale mark on the panning base can be used as a reference for stitching on panoramic shooting. | ✪Elongated knobs provide better grip and easier operation; Both knobs and the panning base screw-knob feature ratchet mechanism, ensuring easy operation and avoid interference with other parts. | Using MAC-15 screw-knob clamp which provides better compatibility with arca-swiss QR plates of different tolerances. | ✪The mounting hole at the base of the head is Arca standard, users can replace the clamp with another one as desired. | ✪The fore-aft tilting angle of the clamp is 180 degrees and it’s also 360 degrees rotatable horizontally. | Comes with DPG-80DRL dedicated QR plate for telephoto lenses, compatible with most telephoto lenses in the market. With raised lip on one side to effectively prevent shifting and safety stop screws at the base avoid accidental dropping of camera from the head.