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.