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Amazon.com : Tamron AF 200-500mm f/5.0-6.3 Di LD SP FEC (IF) Lens for Canon Digital SLR Cameras (Model A08E) (Discontinued by Manufacturer) : Camera Lenses : Electronics
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Tamron Adaptall-2 SP (31A) 200-500mm F5.6 Lens Reviews - Tamron Adaptall Lenses - Pentax Lens Review Database
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