Review: The Sigma Art 50mm f/1.4 for Nikon - Wake Forest / Raleigh NC Photographer Anthony S. Torres' Blog : Wake Forest / Raleigh NC Photographer Anthony S. Torres' Blog
Sigma 50mm f/1.4 DG HSM Art Lens for Nikon F Standard Kit - Walmart.com
Sigma 50mm f/1.4 DG HSM Art Lens Review
Sigma announces 50mm F1.4 DG DN Art lens for E and L mounts: Digital Photography Review