The Canon EF 16-35mm f/2.8L II EF USM Lens is a high performance, water-resistant, and ultra wide-angle L-series lens. 

The optical design has been improved to offer better edge-to-edge image quality. In addition, it features 3 high-precision aspherical lens elements, each ensuring minimal image distortion and color aberration. Improved AF algorithms help the lens to focus faster and quieter.