A few days ago Ricoh filed a patent application in Japan for several full-frame mirrorless telephoto lenses: 70-300mm f/4.5-5.6 100-400mm f/4.5-5.6 100-300mm f/2.8-4 A month ago another Ricoh patent also described sumular mirrorless lenses: 70-400mm 70-300mm The third 150-600mm lens described in the patent is for DSLR cameras (equipped with image stabilization) No related posts.