According to latest rumors, Sigma will announce a new FE lens for exclusively for Sony full frame mirrorless camera. This new lens will be Sigma 24-70mm f/2.8 DG DN Art Lens, development announcement will be on November 6th, 2019.
Sigma has already released three E-mount lenses: 14-24mm f/2.8, 35mm f/1.2, 45mm f/2.8. This will be the fourth E-mount lens, release date is expected in early 2020.
via: SAR