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Amazon.com : Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Canon Digital SLR Cameras : Camera Lenses : Electronics
Sigma 10-20mm F/4-5.6 EX DC HSM Autofocus Lens For Four Thirds System (requires mount adapter for use on MFT){77} at KEH Camera
FS: Sigma 10-20mm 1:4-5.6 EX DC HSM (Pentax Mount): For Sale and Wanted Forum: Digital Photography Review
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