Developed to succeed the
high-performance 17-35mm f/2.8L USM, the new EF 16-35mmf/2.8L USM has
the leading wide-angle range in its class. Due to the proliferation of
digital SLR Cameras that tend to have a smaller frame size when
compared to the 35mm, there is a demand for shorter focal length
lenses.
This has resulted in the development of the EF 16-35mmf/2.8L USM.
This is the first EF lens to have three types of aspherical elements
(ground, replicated and Gmo [glass molded]) which effectively correct
the lens aberrations that occur during zooming.
Despite its longer zoom range, the EF16-35mm f/2.8L USM obtains a
higher image quality than any other lens in its class.The lens embodies
Canon's highest standards of L-series optics, build quality,
reliability and operability.
A robust construction includes dust and moisture resistant seals to
protect against harsh weather conditions.
A fast f/2.8 aperture delivers impressive low light performance and
depth-of-field control. The aperture is fixed over the full focal
range, allowing photographers to maintain a constant fast shutter speed
when zooming.
A ring USM (Ultrasonic Motor) drives extremely rapid auto focus with
near-silent operation. Full time mechanical manual focus override is
available without having to switch out of AF.
The lens offers a minimum focusing distance of 0.28m throughout the
zoom range. The EF 16-35mm f/2.8L II USM incorporates three aspherical
elements to ensure corner-to-corner sharpness and clarity throughout
the focal range.
Two UD (Ultra Low Dispersion) elements virtually eliminate chromatic
aberrations.Super Spectra lens coatings suppress flare and ghosting -
more prone to occur with digital cameras due to reflection off the
image sensor. Coatings also help maintain accurate color balance and
high contrast.
The lens passes distance information back to the camera's E-TTL II
flash system for consistently accurate flash metering.