Tokina AT-X 24-70mm f/2.8 PRO FX Lens for Nikon

Tokina AT-X 24-70mm F2.8 PRO FX Lens for Nikon
The new groundbreaking proprietary optical design uses three precision molded all-glass aspherical lens elements to achieve excellent contrast, sharpness, and corrects for spherical aberrations. One of these elements is very special and difficult to manufacture