Tokina 11-20mm f/2.8 AT-X Pro lens review with samples (APS-C & Full-frame) - YouTube
Tokina AT-X 11-20mm f/2.8 PRO DX Lens for Nikon F With Original Hood, Lens Brush, Ultraviolet Filter (UV) Polarizing Filter (CPL) Fluorescent Daylight Filter (FL-D)