SIGMA 8-16/4.5-5.6 DC HSM For Nikon. This is the first ultra wide zoom lens with a minimum focal length of 8mm, designed especially for APS-C size image sensors. The wide-angle view and exaggerated perspective enables the photographer to emphasize the subject. Four FLD glass elements and three aspherical lenses provide high image quality. The incorporation of HSM ensures quiet and high speed AF as well as full-time manual focus capability.