Is Sigma Developing the Brightest Zoom Lens Yet?

Sigma has multiple zoom lenses in its portfolio. Options such as 14-24mm f2.8 DG DN Art, 28-70mm f2.8 DG DN Contemporary, and 150-600mm f5-6.3 DG DN OS Sports have enabled photographers to capture images of wide and distant objects and people. It now appears the company is focused on providing more options to its existing and new customers, with the introduction of new wide-angle zoom lenses. Here is a look at a patent that describes what they do.