Tamron has just filed a new lens patent on full frame mirrorless lenses. They are Tamron 70-130mm f/2 FE Lens and Tamron 200-400mm f/4 FE Lens. Both lenses are very fast telephoto zoom lenses for full frame mirrorless cameras.
New Tamron Patent: 70-130mm f/2 FE Lens and 200-400mm f/4 FE Lens