Canon Patent For Zoom Lenses For The RF Mount And APS-C Sensor

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Here is an interesting Canon patent application spotted by asobinet.com.

The Canon patent application seems to discuss optical formulas for various zoom lenses for the RF mount, and for APS-C sensors.

Not sure what to think about this patent. Any idea?

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

Canon Patent: 83mm f/1.4 For The Canon RF Mount

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And here is another Canon patent for an RF mount lens.

Spotted by Hi Lows Note, Canon patent application 2021-81531A (Japan) discusses optical formulas for a 83mm f/1.4 lens for full frame mirrorless cameras, i.e. for the EOS R camera system.

Embodiment 1

  • Focal length (mm): 82.87
  • F number: 1.45
  • Half angle of view (degree): 14.63
  • Image height (mm): 21.64
  • Lens length (mm): 126.50
  • Back focus (mm): 13.00

Embodiment 2

  • Focal length (mm): 82.86
  • F number: 1.45
  • Half angle of view (degree): 14.63
  • Image height (mm): 21.64
  • Lens length (mm): 128.50
  • Back focus (mm): 17.13

Embodiment 3

  • Focal length (mm): 82.64
  • F number: 1.45
  • Half angle of view (degree): 14.67
  • Image height (mm): 21.64
  • Lens length (mm): 113.70
  • Back focus (mm): 18.16

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

Canon Patent: 19mm f/2.8 Lens For Full Frame Mirrorless Camera Systems

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Here is another Canon patent for an RF mount lens. And again it is for a lens for the RF mount.

Canon patent application P2021-67826A (Japan) discusses optical formulas for a 19mm f/2.8 lens or a full frame mirrorless camera, the EOS R. The patent was spotted by Hi Lows Note.

Embodiment 1

  • Focal length: 19.50 mm
  • F number: 2.88
  • Half angle of view (degree): 47.99
  • Image Height: 21.65 mm
  • Lens length: 96.33 mm
  • Back focus: 18.34 mm

Embodiment 5

  • Focal length: 19.29 mm
  • F number: 2.86
  • Half angle of view (degree): 48.30
  • Image Height: 21.65 mm
  • Lens length: 96.59 mm
  • Back focus: 18.43 mm

Canon Patent: 20mm f/1.8 And 23mm f/1.8 Lenses For The RF Mount

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And here is yet another Canon patent discussing optical formulas for lenses for the EOS R full frame mirrorless system.

Canon patent application P2021-71624A (Japan) discusses optical designs for a 20mm f/1.8 lens and a 23mm f/1.8 lens for full frame mirrorless systems. That’s the RF mount. The patent was spotted by Hi Lows Note.

Embodiment 1: RF 23mm f/1.8

  • Focal length 23.40 mm
  • F number 1.85
  • Half angle of view (degree) 42.76
  • Image height 21.64 mm
  • Lens length 89.32 mm
  • BF 11.72 mm

Embodiment 2: RF 23mm f/1.8

  • Focal length 23.28 mm
  • F number 1.85
  • Half angle of view (degree) 42.90
  • Image height 21.64 mm
  • Lens length 93.32 mm
  • BF 12.72 mm

Embodiment 3: RF 20mm f/1.8

  • Focal length 20.60 mm
  • F number 1.85
  • Half angle of view (degree) 46.40
  • Image height 21.64mm
  • Lens length 88.73 mm
  • BF 11.72 mm

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

Canon Patent: Full Frame Lenses With Front And Rear Apodised Optical Elements

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A new Canon patent application for lenses with apodised optical elements on the front and back of the lens barrel. While not 100% sure I guess these are also lenses for the RF mount.

Canon patent application 20210124182 (USA) discusses optical formulas for full frame lenses with apodised elements on the fron and back of the lens. The lenses found in the patent literature:

  • 135mm f/2
  • 130mm f/4
  • 70mm f/1.2
  • 24mm f/1.4

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

Source: NL

Canon Patent: 35mm f/1.4 And 28mm f/1.4 For The EOS R System

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Here is one more Canon patent for RF mount lenses, another one in an already long list: 35mm f/1.4 and 28mm f/1.4 lenses for full frame mirrorless cameras, i.e. the EOS R.

Canon patent application 2021-063966 (Japan) discusses optical formulas for a 35mm f/1.4 lens and a 28mm f/1.4 lens, both for the RF mount. The patent application was spotted by Canon News.

28mm f/1.4:

Focus distance      28.00
F number             1.42
Half angle (degree) 37.69
Image height        21.64
Lens total length  140.62
BF                  21.99

35mm f/1.4:

Focus distance      34.98
F number             1.42
Half angle (degree) 31.73
Image height        21.64
Lens total length  154.45
BF                  16.17

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