Sigma 17-50mm f/2.8 EX DC HSM Lens for Pentax K 58C109 B&H Photo
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Sigma 17-50mm f/2.8 EX DC OS HSM (FLD) Autofocus APS-C Lens for Select Nikon F-Mount Cameras {77} at KEH Camera
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MINT * Sigma 17-50mm f/2.8 EX DC OS HSM FLD Lens for Nikon - Canada – Paramount Camera & Repair
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Sigma EX DC HSM 17-50mm F2.8 Lens Reviews - Sigma Lenses - Pentax Lens Review Database