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All About Photographic Lenses, Modern and Old. Specifications, comparisons, user reviews, features, comments, tests, MTF-charts for lenses by Canon,Nikon, Sony, Pentax, Olympus, Sigma, Tamron, Carl Zeiss, etc.
Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary Lens 745-101 B&H