Nodal Ninja R1 Adjustable Tilt Ring Clamp Style Panoramic Tripod Head - fits Sigma 8mm f/3.5 and/or 15mm Nikon Lens Nodal Ninja Ultimate R1 with D5 Rotator A single row pano head designed for use with circular and full frame fisheye lenses Comes with Sigma 8mm f/3.5 - 15mm Nikon Lens Ring