Sigma has just filed a series of new FE DG DN lens patents for Sony full frame mirrorless cameras. All these lens patents are fast wide-angle prime lenses: 16mm f/2 DG DN, 18mm f/1.8 DG DN, 18mm f/2 DG DN, 20mm f/1.8 DG DN, 24mm f/1.8 DG DN, 28mm f/1.8 DG DN, 34mm f/1.8 DG DN lenses.