Canon EF-S 18-55mm f/3.5-5.6 is STM Lens The EF-S 18-55mm f/3.5-5.6 IS STM Lens from Canon is a standard zoom compatible with Canon APS-C format cameras. It features a focal length range of 18-55mm which is equivalent to 29-88mm in the 35mm format. Optical Image Stabilization provides the equivalent of up to four stops of shake correction for clear imaging, even in low light.