Amazon.com : Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large
Amazon.com : Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large,Amazon.com : Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large,Sigma 17-50mm f/2.8 EX DC OS HSM Lens for Canon EF 583101 B&H,Used Sigma 17-50mm f/2.8 EX DC OS HSM - Canon EF-S Fit | MPB,SIGMA 17-50mm F/2.8 EX DC OS HSM for Canon | eBay