The Sigma APO 70-200mm F2.8 EX DG OS HSM has side-mounted switches to choose between manual focus and autofocus and to pick the image-stabilization mode.
This shot of trees silhouetted against a bright overcast sky shows the lens' sharpness and lack of chromatic aberration when you pixel peep at the cropped portion of the shot, below. 1/100sec, f8, 97mm
Wide open, the lens is sharp, too. The sun is fuzzy from atmospheric distortion, but the crop shows the water ripples to be sharp in sunrise shot. Note also the lack of flare despite shooting directly into the sun; in other circumstances, the lens produces flare, however. 1/2000sec, f2.8, 200mm
At f8, the Sigma APO 70-200mm F2.8 EX DG OS HSM is nice and sharp. Below are several 100 percent crops of Beauvais Cathedral in France on a sunny day. 1/320 sec., f8, 70mm
The Sigma APO 70-200mm F2.8 EX DG OS HSM comes with a petal-shaped lens hood and removable tripod mount, and though it's not bulkier than other f2.8 lenses of this zoom range, it's not small.
The Sigma APO 70-200mm F2.8 EX DG OS HSM autofocus is generally fast enough to help catch difficult subjects such as this quadcopter moving in dark conditions. 1/250 sec., f2.8, 119mm
