The EF 16-35mm f/2.8L II USM Lens from Canon
is a high performance, water-resistant, ultra wide-angle L-series zoom
lens. An f/2.8 maximum aperture is effective in low light situations and
offers shallow depth of field focus control. 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 of a
different type: ground, replica and GMo. Its ultrasonic motor (USM) and
improved AF algorithms will help the lens to focus faster and quieter.
Precise manual focus is supported even in One Shot AF mode and a truly
round aperture results in pleasing background blur.
All of the "L"
lenses deliver optical performance equal to similar fixed focal lengths
lenses and provide tight seal structures for dust and water resistance.
Distortions and aberrations are remarkably small for a lens of such
amazing capabilities. An included petal-style lens hood keeps unwanted
light from entering the lens and causing flare and it offers a degree of
protection against impact and the elements