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Canon Patent: RF 70-300mm f/3.5-5.6 & RF 100-500mm f/5.6-6.4 Lenses (EOS R)

Canon Patent:  RF 70-300mm F/3.5-5.6 & RF 100-500mm F/5.6-6.4 Lenses (EOS R)
Image from the Canon patent literature

Here is a new Canon patent application, and again it is about lenses for the RF mount.

Canon patent application 2020-64176 discusses optical formulas for an RF 70-300mm f/3.5-5.6 and an RF 100-500mm f/5.6-6.4 lens, both are for the EOS R full frame mirrorless system.

RF 70-300mm f/3.5-5.6

  • Zoom ration: 3.97
  • Focal length: 72.86 133.96 289.00 mm
  • F number: 3.75 4.66 5.83
  • Half angle ov view: 16.54 9.17 4.28
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 162.01 202.44 237.12 mm
  • Back focus: 13.80 31.02 57.79 mm

RF 100-500mm f/5.6-6.4

  • Zoom ration: 4.75
  • Focal length: 102.00 220.00 485.00 mm
  • F number: 5.69 6.14 6.43
  • Half angle of view: 11.98 5.62 2.55
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 213.16 266.00 293.16 mm
  • Bacl focus: 11.09 26.50 42.04 mm

This might be a patent that gets into production sooner or later. More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

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