Sigma's 70-300mm F4-5.6 APO MACRO SUPER is one of several tele zoom lenses. It is a compact Apochromatic tele zoom lens incorporating two Special Low Dispersion glass elements in the front lens group, plus one Special Low Dispersion glass element in the rear lens group, to minimize chromatic aberration. It is a Tele-Macro Zoom lens, capable of focusing down to 1:2 (half life-size) reproduction ratio at 300mm focal length with superb optical quality. A detachable bayonet hood is provided. The lens materials used in this new product are lead and arsenic free ecological glass.