The Silver EF-M 55-200mm f/4.5-6.3 IS STM Lens from Canon is an 88-320mm equivalent zoom designed for APS-C-format EOS M-series mirrorless cameras. An STM stepping motor is also featured, which produces fast, smooth, and near-silent autofocus performance to support both stills and video recording applications. For increased control, full-time manual focus operation is also available for making fine-tuned focus adjustments. An STM stepping motor is also featured, which produces fast, smooth, and near-silent autofocus performance to support both stills and video recording applications. For increased control, full-time manual focus operation is also available for making fine-tuned focus adjustments. One aspherical element and one UD element combine to reduce chromatic aberrations throughout the zoom range for increased sharpness and clarity.STM stepping motor offers fast, quiet, smooth, and accurate autofocus performance that is ideal for video recording as well as still shooting. The rounded seven-blade diaphragm produces a smooth out-of-focus quality when working with shallow depth of field or selective focus techniques.