Wide-angle zoom is designed for
APS-C-format Canon EF-S-mount DSLRs and provides a 16-28.8mm equivalent focal
length range.
One ultra-low dispersion glass
element noticeably reduces color fringing and chromatic aberrations for high
clarity and color fidelity.
One aspherical element limits
distortion and spherical aberration in order to realize greater sharpness and
accurate rendering.
Super Spectra coating has been
applied to individual elements to minimize ghosting and flare for greater
contrast and color neutrality when working in strong lighting conditions.
An Optical Image Stabilizer
helps to minimize the appearance of camera shake by up to four shutter speed
stops to better enable working in low-light conditions and with slower shutter
speeds.
An STM stepping AF motor
realizes smooth, near-silent autofocus that is complemented by a rear focus
system, advanced AF algorithms, and a high-speed CPU for fast AF performance.
Additionally, full-time manual focus override is also available.
Rounded seven-blade diaphragm
contributes to a pleasing out of focus quality that benefits the use of shallow
depth of field and selective focus techniques.