Canon EF-S 10-18mm f/4.5-5.6 IS STM Lens with 67mm UV Protector and Accessory Bundle EF-S MOUNT LENS: Designed specifically for EOS APS-C DSLRs, where it provides a 35mm-equivalent focal length range of 16-28.8mm STEPPING MOTOR : This function enables smooth and incredibly quiet continuous auto focusing capabilities while recording video or shooting still images. COMPACT DESIGN:The sleek and streamlined lines of this lens are possible thanks to a new advanced 4 group zoom optical system. LOW DISPERSION:Glass Canon's Low Dispersion technology is engineered to reduce chromatic aberrations meaning your images will come out clear and crisp. Less chance of light defracting into your shot. OPTICAL STABILIZER: A feature that employs an innate, built-in mechanism in order to compensate for camera shake.