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. One ultra-low dispersion glass element noticeably reduces color fringing and chromatic aberrations for high clarity and color fidelity. 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 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, a full-time manual focus override is also available.
Canon EF-S 10-18mm F/4.5-5.6 IS STM Specs