The EF-S 10-22mm f/3.5-4.5 USM Lens from Canon is an
ultra wide-angle zoom lens with dynamic expressive capability and a
lightweight build for all EF-S mount digital EOS cameras.
effective focal length range of approximately 16-35mm in 35mm format,
this lens allows you to get extremely close to subjects, exaggerating
the difference in size between a near object and its background.
Creative photographers can use this phenomenon to create excellent
separation between subject and background for a strong sense of
presence, or for a pan-focus effect with everything from foreground to
background sharply in focus. An Ultrasonic Motor (USM) provides fast,
smooth and quiet autofocus action and manual focus override in the One
Shot AF mode enables precise focusing at all times.
specifically for digital photography with APS-C size sensors, the lens
has three aspherical and one Ultra-low Dispersion elements to minimize
aberrations and Super Spectra coatings to suppress ghosting and flare,
which can be caused by reflections off digital camera sensors. An
optional lens hood can further reduce the incidence of flare.