Canon Patent: 35-600mm f/4-7.2 Zoom Lens For The RF Mount

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Here is a new Canon patent application. As so often lately, this one too refers to an RF mount lens.

Canon patent application 2021-193435 (Japan) discusses optical formulas for what could be a very interesting zoom lens for EOS R photographers. Indeed, it could be the mother of all zoom lenses. A RF 35-600mm f/4-7.2 zoom lens (example 4, below) is discussed in the patent literature (along with a 24-300mm lens).

Example 1:

  • Focus focal length 24.74 76.74 387.90
  • F number 3.60 5.30 6.50
  • Half angle of view 39.51 15.75 3.19
  • Image height 20.40 21.64 21.64
  • Lens total length 194.51 241.18 287.86
  • BF 13.32 48.47 46.4

Example 2:

  • Focal length 24.72 69.39 289.87
  • F number 3.60 5.30 5.88
  • Half angle of view 39.53 17.32 4.27
  • Image height 20.40 21.64 21.64
  • Lens total length 168.78 202.25 235.73
  • BF 13.34 39.12 36.81

Example 3:

  • Focal length 28.81 94.89 484.70
  • F number 3.60 5.30 7.20
  • Half angle of view 35.30 12.84 2.56
  • Image height 20.40 21.64 21.64
  • Lens total length 194.00 240.17 286.34
  • BF 13.85 43.81 39.37

Example 4:

  • Focal length 33.05 140.67 581.87
  • F number 4.10 5.90 7.20
  • Half angle of view 31.69 8.74 2.13
  • Image height 20.40 21.64 21.64
  • Lens total length 218.72 276.34 333.97
  • BF 14.32 39.28 46.78

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

[via asobinet.com]

Canon Patent: 24-100mm f/2.8 And 24-70mm f/2-3.5

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Here is a new Canon patent application, for a 24-100mm f/2.8 and a 24-70mm f/2-3.5 lens. The design seems to be agnostic, meaning no mount type is specified.

Canon patent application 2021-189218 (Japan) discusses optical formulas for two lenses: 24-100mm f/2.8 and a 24-70mm f/2-3.5.

Example 1

  • Zoom ratio 3.92
  • Wide-angle intermediate telephoto
  • Focal length 24.72 48.69 97.00
  • F number 2.90 2.90 2.90
  • Half angle of view 37.60 23.96 12.57
  • Lens total length 119.56 132.86 152.43
  • BF 5.30 10.90 19.16

Example 2

  • Zoom ratio 2.75
  • Wide-angle intermediate telephoto
  • Focal length 24.72 40.75 67.96
  • F number 2.06 3.50 3.50
  • Half angle of view 37.60 27.97 17.66
  • Lens total length 105.84 115.84 131.74
  • BF 13.77 21.03 28.47

Example 3

  • Zoom ratio 2.75
  • Wide-angle intermediate telephoto
  • Focal length 24.72 40.96 67.96
  • F number 2.90 2.90 2.90
  • Half angle of view 37.60 27.84 17.66
  • Lens total length 93.83 105.51 121.76
  • BF 3.29 10.64 20.42

Example 4

  • Zoom ratio 3.92
  • Wide-angle intermediate telephoto
  • Focal length 24.72 48.16 97.00
  • F number 2.90 3.50 3.50
  • Half angle of view 37.60 24.19 12.57
  • Image height 19.04 21.64 21.64
  • Lens total length 98.44 114.37 139.82
  • BF 3.88 12.29 24.26

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

[via asobinet.com]

Canon Patent: 14-280mm f/2.8-5.6 Lens For 4/3 Sensor

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Does Canon have a 4/3 camera in their lineup? However, here is a Canon patent application for a lens that seems to fit such a sensor.

Canon patent application 2021-183997 (Japan) discusses optical formulas for a 14-280mm f/2.8-5.6 lens for a camera with a 4/3 sensor. From the patent literature:

There are known zoom lenses that are compact and can efficiently obtain a magnification ratio, which are suitable for image pickup devices such as digital cameras, video cameras, and TV cameras. The zoom lens has a first lens group having a positive refractive power, a second lens group having a negative refractive power, and a third lens group having a positive or negative refractive power in order from the object side to the image side. There is something. In the zoom lens, the lens group on the image side of the third lens group is moved to correct (compensate) the image plane movement due to the scaling.

Example 1

  • Focal length 14.26 117.92 280.89
  • F number 2.88 5.38 5.77
  • Half angle of view (°) 37.19 5.24 2.21
  • Image height 10.82 10.82 10.82
  • Lens total length 181.14 181.14 181.14
  • BF 19.35 10.59 6.46

The patent also describes a lens with 10x zoom. Maybe both lenses are for an upcoming PowerShot-like camera with a 4/3 sensor? Or a video camera?

Example 2

  • Focal length 17.51 ​​87.85 169.87
  • F number 2.27 4.40 4.63
  • Half angle of view (°) 31.70 7.02 3.64
  • Image height 10.82 10.82 10.82
  • Lens total length 129.45 129.45 129.45
  • BF 21.20 11.01 6.13

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

[via asobinet.com]

Canon Patent: More RF Mount Lenses – 14mm f/1.8 & 20mm f/1.4

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And yet another Canon patent application for RF mount lenses. This time we have a 14mm f/1.8 and a 20mm f/1.4.

Canon patent application 2021-184030 (Japan) discusses optical designs for a 14mm f/1.8 and a 20mm f/1.4 lens, both for full frame mirrorless cameras, i.e. for the EOS R lineup.

PROBLEM TO BE SOLVED: To provide a single focus lens which is advantageous in terms of wide angle, small size and high optical performance, for example.

An image pickup optical system used in a photographic camera and a movie camera is required to have a wide angle, a small F value, and an image pickup optical system having substantially uniform resolution from the center of the screen to the periphery of the screen over the entire object distance. ing. In order to realize such an imaging optical system, a first lens group fixed at the time of focusing is arranged on the most object side, and a plurality of negative lenses are continuously arranged from the most object side in the first lens group. A single focus lens (single focus optical system) has been proposed. Patent Document 1 describes a single focal length optical system having a focal length of 24 mm and an F value of 1.4, and Patent Document 2 describes a single focal length optical system having a focal length of 20 mm and an F value of 1.4.

Example 1

  • Focal length 18.46
  • F number 1.73
  • Angle of view 49.53
  • Image height 21.64
  • Lens total length 144.17
  • BF 39.17

Example 2

  • Focal length 14.42
  • F number 1.74
  • Angle of view 56.31
  • Image height 21.64
  • Lens total length 151.49
  • BF 37.99

Example 4

  • Focal length 20.00
  • F number 1.46
  • Angle of view 47.25
  • Image height 21.64
  • Lens total length 146.11
  • BF 38.99

Example 5

  • Focal length 16.00
  • F number 1.74
  • Angle of view 53.52
  • Image height 21.64
  • Lens total length 127.35
  • BF 35.73

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

[via asobinet.com]

Canon Patent: RF 17-60mm, 17-70mm, 17-85mm, all f/4-5.6

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Here is a new Canon patent application for RF mount lenses.

Canon patent application 2021-182053 (Japan, spotted by Hi Lows Note) discusses optical formulas for the following lenses: RF 17-60mm f/4-5.6, 17-70mm f/4-5.6 and 17-85mm f/4-5.6.

Embodiment 1

  • Focal length (mm): 17.50 28.00 58.00
  • F number: 4.10 4.50 5.70
  • Half angle of view (degree): 51.50 38.16 20.77
  • Maximum image height (mm): 22.00 22.00 22.00
  • Image height (mm): 19.47 20.98 21.94
  • Lens length (mm): 108.50 114.27 158.50
  • BF (mm): 21.38 33.45 49.01

Embodiment 2

  • Focal length (mm): 17.50 35.00 68.00
  • F number: 4.10 4.50 5.70
  • Half angle of view (degree): 51.50 32.15 17.93
  • Maximum image height (mm): 22.00 22.00 22.00
  • Image height (mm): 19.43 21.75 22.10
  • Lens length (mm): 123.50 130.13 173.50
  • BF (mm): 18.27 33.13 42.65

Embodiment 3

  • Focal length (mm): 17.50 40.00 83.50
  • F number: 4.10 4.50 5.70
  • Half angle of view (degree): 51.50 28.81 14.76
  • Maximum image height (mm): 22.00 22.00 22.00
  • Image height (mm): 19.43 22.05 22.41
  • Lens length (mm): 130.50 135.64 183.50
  • BF (mm): 14.89 34.26 43.12

Embodiment 4

  • Focal length (mm): 17.50 35.00 68.00
  • F number: 4.10 4.50 5.70
  • Half angle of view (degree): 51.50 32.15 17.93
  • Maximum image height (mm): 22.00 22.00 22.00
  • Image height (mm): 19.39 21.53 22.27
  • Lens length (mm): 126.50 125.61 176.50
  • BF (mm): 14.57 27.63 38.40

Don’t think these lenses will ever go into production.

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

Canon Patent: 28-70mm f/2.8 And 28-60mm f/4 Lenses For RF Mount

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And yet another Canon patent application for lenses for the RF mount (EOS R).

Canon patent application 2021-179550A (Japan, spotted by Hi Lows Note) discusses optical formulas for a 28-70mm f/2.8 and a 28-60mm f/4 lens, both for full frame mirrorless cameras (hence for the RF mount on the EOS R).

Embodiment 1

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.89 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.65 28.06 17.67
  • Image height (mm): 21.64 21.64 21.64
  • Lens length (mm): 149.46 133.18 115.94
  • Back focus (mm): 13.48 19.38 27.78

Embodiment 2

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.96 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.68 27.27 17.67
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 152.91 136.27 115.98
  • Back focus (mm): 13.50 19.41 26.94


Embodiment 3

  • Zoom ratio: 2.08
  • Focal length (mm): 28.84 33.20 60.00
  • F number: 4.12 4.12 4.12
  • Half angle of view (degree): 32.68 31.82 19.83
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 141.33 130.27 104.61
  • Back focus (mm): 19.70 21.65 35.51

Embodiment 4

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 37.16 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.68 29.00 17.67
  • Image height (mm): 18.50 20.60 21.64
  • Lens length (mm): 121.04 110.42 101.92
  • Back focus (mm): 9.97 13.25 25.53

Embodiment 5

  • Zoom ratio: 2.35
  • Focal length (mm): 28.84 39.87 67.90
  • F number: 2.91 2.91 2.91
  • Half angle of view (degree): 32.65 28.07 17.67
  • Image height (mm): 21.64 21.64 21.64
  • Lens length (mm): 146.19 132.32 116.42
  • Back focus (mm): 14.84 20.01 28.77