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Review of Canon EF-S 17-55mm f/2.8, EF-S 17-85mm f/4.0-5.6, Tamron 17-50mm f/2.8 XR LD, Sigma 18-50mm f/2.8 DC Macro and Canon 18-55mm f/3.5-5.6
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Fast zoom lens battle: Canon 17-55 f2.8, Sigma 18-35 f1.8, Tamron 17-50 f2.8 VC, Sigma 17-50 f2.8 OS - YouTube
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Amazon.com : Sigma 18-50mm f/2.8-4.5 SLD Aspherical DC Optical Stabilized (OS) Lens with Hyper Sonic Motor (HSM) for Nikon Digital SLR Cameras : Camera Lenses : Electronics
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