Amazon.com : Sigma 17-35mm f/2.8-4 EX DG IF HSM Aspherical Super Wide Angle Zoom Lens for Minolta an

Sigma's 17-35mm f2.8-4 EX is one of the EX Series lenses. It combines a fast f2.8-4 maximum aperture with ultra wide angle zoom lens of 17-35mm. It incorporates aspherical lens elements in the front, as well as rear lens groups, to correct spherical aberr

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