Sigma 120-400mm /4.5-5.6 DG OS HSM APO Autofocus Lens for Canon. The OS system uses two sensors inside the lens to detect vertical and horizontal movement of the camera. It works by moving an optical image stabilizing lens group, to effectively compensate for camera shake. It automatically detects movement of the camera and compensates for camera shake when shooting moving subject such as motor sports. The HSM (Hyper Sonic Motor) system ensures quiet and high-speed auto focusing with full time manual focus override. Three Special Low Dispersion (SLD) elements provide excellent correction for chromatic aberration. So Purchase a Sigma 120-400mm f/4.5-5.6 DG OS HSM APO Autofocus Lens for Canon for $783 + Free Shipping! Use coupon code: Loyalty15 at checkout.
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