Photo 1 of sigma 17-50mm f/2.8 ex dc os hsm fld large aperture standard zoom lens for nikon digital dslr camera

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Photo 1 of sigma 17-50mm f/2.8 ex dc os hsm fld large aperture standard zoom lens for nikon digital dslr cameraPhoto 2 of sigma 17-50mm f/2.8 ex dc os hsm fld large aperture standard zoom lens for nikon digital dslr cameraPhoto 3 of sigma 17-50mm f/2.8 ex dc os hsm fld large aperture standard zoom lens for nikon digital dslr camera