Review: Sigma 28mm f1.4 DG HSM Art (What The 35mm Should've Been)
Amazon.com : Sigma 28mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras : Camera Lenses : Electronics
Sigma 28mm f1.4 Art review | Cameralabs
Sigma 28mm F1.4 Art lens now available for pre-order on Canon, Nikon, Sigma and Sony mounts: Digital Photography Review
Amazon.com : Sigma 28mm F1.8 II Aspherical Lens for Nikon-AF Camera : Camera Lenses : Electronics
Sigma 28mm F1.4 Art lens now available for pre-order on Canon, Nikon, Sigma and Sony mounts: Digital Photography Review
Sigma 28mm f1.4 Art review | Cameralabs
Amazon.com : Sigma 28mm f/1.4 DG HSM Art Lens for Nikon F Mount (441955) USA with Professional Bundle Package Deal 441955 USA – 9 pc Filter Kit + SanDisk 64gb SD Card + Backpack + More : Electronics