Amazon.com : Sigma 50mm F1.4 Art DG HSM Lens for Nikon : Electronics
Sigma 50mm F/1.4 DG (HSM) A (Art) Full Frame Lens for Canon EF-Mount {77} at KEH Camera
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
Amazon.com : Sigma 50mm F1.4 Art DG HSM Lens for Nikon : Electronics