Canon EF 16-35mm f/2.8L II USM

Manufacturer's Description:

"Canon's engineers have completely redesigned the optics on the EF 16-35mm f/2.8L II USM to deliver higher contrast levels and improved resolving power. To ensure corner-to-corner sharpness and contrast throughout the focal range, the lens includes three types of aspherical lens elements (ground, replicated and glass moulded). Two UD lens elements virtually eliminate chromatic aberration, while Super Spectra lens coatings suppress flare and ghosting."