The Canon EF-M 11-22mm f/4-5.6 IS STM Lens provides a 35mm equivalent focal length of 18-35mm and features continuous AF with a built-in STM stepping AF motor to provide smooth, near-silent performance that is especially beneficial to video recording. In addition, two aspherical lenses are combined to help reduce spherical aberration over the entire image area, as well as through the full zoom range.