This large aperture standard zoom lens covers focal lengths from 24mm. The optical design provides a compact construction and is ideal for general photography. ELD (Extraordinary Low Dispersion) glass, two SLD (Special Low Dispersion) glass elements and three aspherical lenses provide excellent correction of all types of aberrations. This lens incorporates HSM (Hyper Sonic Motor), ensuring a quiet and high speed AF as well as full time manual focus capability. It has a minimum focusing distance of 38cm/15-inch and a maximum magnification ratio of 1:5.3. The rounded 9 blades diaphragm creates an attractive blur to the out of focus areas.