Sigma 70-300mm f/4-5.6 APO Macro Super Lens for Canon SLR Cameras Dedicateed to Canon AF SLR cameras Ultra-telephoto, telephoto, and macro photography all in one lens High magnification of 1:2 (one half life-size) for macro photography Lens constructed of an ecological, lead- and arsenic-free glass Two special low-dispersion glass elements in the front lens group, in addition to a special low-dispersion glass element in the rear lens group