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Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens for Canon Digital DSLR Camera
Minimum focusing distance of 11 inches throughout the entire zoom range
Magnification ratio of 1:5.
Focal length from 17mm wide angle and offers a large aperture of F2.8 throughout the entire zoom range
Video Review Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens for Canon Digital DSLR Camera