Canon Patent: Prime Lenses And A Wide Angle Zoom For Canon EOS R

Canon Patent

Canon patent application 2019-204115A presents a bunch of prime lenses and a wide angle zoom, all for the RF mount

The Canon patent discusses the optical formulas for these lenses for the Canon EOS R full frame mirrorless system:

  • 35mm F/1.8
  • 20mm F/2
  • 35mm F/2.8
  • 45mm F/2.8
  • 35mm F/2
  • 16-34mm F/4

With more details:

35mm F/1.8 (RF 35mm F1.8 MACRO IS STM)

  • Focal length: 35.60 mm
  • F number: 1.85
  • Half angle of view: 31.22
  • Image height: 21.64 mm
  • Lens length: 81.87 mm
  • Back focus: 13.49 mm

RF 20mm F/2

  • Focal length: 20.50 mm
  • F number: 2.06
  • Half angle of view: 46.54
  • Image height: 21.64 mm
  • Lens length: 90.13 mm
  • Back focus: 13.50 mm

RF 35mm F/2.8

  • Focal length: 35.70 mm
  • F number: 2.88
  • Half angle of view: 31.22
  • Image height: 21.64 mm
  • Lens length: 60.00 mm
  • Back focus: 13.15 mm

RF 45mm F/2.8

  • Focal length: 44.70 mm
  • F number: 2.85
  • Half angle of view: 25.83
  • Image height: 21.64 mm
  • Lens length: 62.63 mm
  • Back focus: 13.13 mm

RF 35mm F/2

  • Focal length: 35.91 mm
  • F number: 2.06
  • Half angle of view: 31.07
  • Image height: 21.64 mm
  • Lens length: 50.50 mm
  • Back focus: 15.05 mm

RF 16-34mm F/4

  • Focal length: 16.48 24.02 33.75 mm
  • F number: 4.12
  • Half angle of view: 52.70 42.01 32.66
  • Image height: 21.64 mm
  • Lens length: 117.64 109.16 110.13 mm
  • Back focus: 11.50 19.17 29.63 mm

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

[via Hi Lows Note]

Canon Patent For Various Small/Pancake Prime Lenses For EOS R

Prime Lenses

Just small or pancake prime lenses? We are not sure. We are just sure they are small and for the Canon EOS R full frame mirrorless system.

Canon patent application 2019-152683 discusses optical formulas for the following (small) prime lenses:

  • Canon RF 20mm F/2.0
  • Canon RF 35mm F/2.8
  • Canon RF 45mm F/2.8
  • Canon RF 35mm F/2.0

and a 16-35mm f/4 lens, also discussed in the patent application. The lenses appear to be non-L lenses, i.e. less expensive lenses. Are these pancake lenses, in you opinion?


More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production are these:

Source: Canon News