The ef m 15ndash45mm f35ndash63 is stm is a compact stylish zoom lens for eos m series digital cameras a special retraction mechanism shortens the length of the lens to just 176 inches 445mm when the camera is off to help make carrying and storing the lens and camera even easier the quiet stepping motor stm design helps ensure low noise focusing thatrsquos ideal for recording movies the 35mm equivalent 24ndash72mm range combines a wide angle for landscapes and big group photos with a