A flexible wide-angle zoom in a compact form factor, the EF-S 10-18mm f/4.5-5.6 IS STM from Canon is a 16-28.8mm equivalent lens designed for EF-S-mount DSLRs. Helping to reduce the overall size while maintaining high optical quality, a four-group zoom design is employed along with one ultra-low dispersion element, one aspherical element, and one large-diameter element to produce sharp, clear imagery void of chromatic and spherical aberrations. A Super Spectra coating has also been applied to suppress flare and ghosting for increased contrast and color neutrality. Benefitting both photo and video applications, an STM stepping AF motor is used to realize quick and near-silent autofocus performance along with full-time manual focus override. Additionally, a four-stop-effective Image Stabilizer system is also featured and minimizes the appearance of camera shake for sharper handheld shooting.