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![Sigma 50-500mm F4.5-6.3 APO DG OS HSM [REVIEW]](https://i0.wp.com/digital-photography-school.com/wp-content/uploads/2012/03/PeterWestCarey-CameraAwesomePhoto1.jpg?w=600&h=1260&ssl=1 "Sigma 50-500mm F4.5-6.3 APO DG OS HSM [REVIEW]")