XB-44DDHX XB Low-Profile Ball Head with Panning Clamp DDH-05NXB 44DDHX is the DDH 05N Panning Clamp. Precision Panning Base with integral clamp and bubble level for smooth and level panning. It's your ideal ball head for shooting panoramas. The scale with laser engraved centering index marks can precisely master any angle variation during each shoot in horizontal rotationthe aligned scale of quick release plate can accurately control the nodal point during the panoramic photography in different focal lengths.