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Sony A57 and the Tamron 17-50mm f/2.8 XR Di II LD Lens and the Sigma 50mm f/1.4 EX DG HSM Lens!! – SonyAlphaLab
Re: Sigma 17-50mm F2.8 EX DC OS: Sony Alpha / NEX E-mount (APS-C) Talk Forum: Digital Photography Review
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Amazon.com : Tamron SP AF 17-50mm F/2.8 XR LD Di-II Aspherical (IF) Zoom Lens : Camera Lenses : Electronics
Tamron SP AF XR LD Aspherical IF Di II 17-50mm F2.8 Lens Reviews - Tamron Lenses - Pentax Lens Review Database
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