Sigma has released a range of firmware updates for some of their Art, Sports and Contemporary lenses for both Canon and Nikon to add feature support and fix a few bugs. There’s also an update for the Sigma MC-11 adapters expand lens compatibility.
When you think of a 500mm lens, shooting portraits probably isn’t the first thing that comes to mind. Still, Keydrin Franklin used it for this unordinary purpose. He tested out how Sigma 500mm f/4 performs in portrait photography, and in this video, you can see some examples and hear his impressions.