Tokina AT X Wide-Angle Zoom Lens for Nikon F - 11mm-20mm - F/2.8

The Tokina AT-X 11-20mm F/2.8 PRO DX is an ultra-wide zoom lens featuring an expanded zoom range and improved optical performance. Designed for use with Canon and Nikon DSLR cameras with APS-C (DX) sensors. Tokina adds to its family of fast-aperture wide-angle zooms focused on providing photographers professional quality optics and construction at an affordable price. The fast F/2.8 aperture lens offers an equivalent 16.5-30mm zoom range. The proprietary optical design uses three aspherical lens elements (2 all-glass molded and 1 P-MO hybrid) to achieve superior contrast, sharpness, and correct for spherical aberrations. Additionally, Tokina uses three SD (super-low Dispersion, "FK01" and FK03") glass elements to control chromatic aberrations.