File:Sigma 200-500mm F2.8 EX DG APO 02.jpg - Wikimedia Commons
Sigma 200-500mm f/2.8
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File:Sigma 200-500mm F2.8 EX DG APO 2013 CP+.jpg - Wikimedia Commons
Sigma 200-500mm f/2.8 APO EX DG
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Testing out Sigma's 200-500mm f/2.8 green whale of a lens
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Sigma APO 200-500mm lens
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