Ricoh filed a patent for a 100-300mm f/2.8-4 SR full-frame mirrorless lens

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)

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