Canon Patent: Electronic Viewfinder With Folded Optics

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Here is a Canon patent application for a new EVF (Electronic ViewFinder) for a mirrorless camera. Folded optics are employed.

Canon patent application 2020-95073A (Japan) discusses a new kind of Electronic Viewfinder featuring folded optics, a technology used for smartphone camera lenses and everywhere you want to have an optical path that’s longer than the size of the system. Prismatic binoculars being a good example.

The EVF in the patent literature uses polarized surfaces to maximize reflection. We think this patent might go into production, sooner or later. The patent application was spotted by Hi Lows Note.

folded optics

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

Canon Patent: Macro Lenses For EOS R System (85mm, 95mm, 100mm, all f/2.8)

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And now let’s go for one more Canon patent for an RF mount lens.

Canon patent application 2020-91334A (spotted by Hi Lows Note) discusses optical formulas for three macro lens for the RF mount.

RF 85mm F2.8 1:1 MACRO

  • Focal length: 84.92 mm
  • F number: 2.92
  • Half angle of view: 14.29
  • Image height: 21.64 mm
  • Lens length: 120.23 mm
  • Back focus: 10.60 mm

RF 95mm F2.8 1:1 MACRO

  • Focal length: 94.82 mm
  • F number: 2.92
  • Half angle of view: 12.85
  • Image height: 21.64 mm
  • Lens length: 124.00 mm
  • Back focus: 14.11 mm

RF 100mm F2.8 1:1 MACRO

  • Focal length: 99.75 mm
  • F number: 2.92
  • Half angle of view: 12.24
  • Image height: 21.64 mm
  • Lens length: 169.97 mm
  • Back focus: 14.00 mm

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

Canon Patent: Telephoto Lenses For The EOS R System (100-600mm & 120-700mm)

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And yet another Canon patent dealing with lenses for the Canon EOS R full frame mirrorless system.

Canon patent application 20200174234 (US) discusses optical formulas for two telephoto lenses for the RF mount: 100-600mm f/4.5-7.1 and 120-700mm f/4.5-8.

RF 100-600mm f/4.5-7.1:

  • Focal Length: 103-00mm
  • F-Number: 4.6-6.8
  • Half Angle of View: 11.86° – 4.98° – 2.07°
  • Image Height: 21.64mm
  • Lens Length: 241mm-331mm
  • Backfocus: 17mm-97mm

RF 120-700mm f/4.5-8:

  • Focal Length: 123-700mm
  • F-Number: 4.6-8.0
  • Half Angle of View: 9.98° – 4.22° – 1.77°
  • Image Height: 21.64mm
  • Lens Length: 246mm-370mm
  • Backfocus: 14mm-107mm

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

Source: Canon News

Canon Patent: RF 24-70mm f/2 And RF 24-105mm f/4L IS USM Lenses

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A Canon patent discussing optical formulas for two lenses for the Canon RF mount (EOS R).

Canon patent application 2020-79965A discusses optical formulas for a RF 24-70mm f/2 lens and a RF 24-105mm f/4L IS USM lens.

RF 24-105mm f/4 L IS USM

  • Zoom ratio: 4.12
  • Focal length: 24.72 50.92 101.84 mm
  • F number: 4.12 4.12 4.12
  • Half angle of view: 41.19 23.02 11.99
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 125.34 142.50 169.34 mm
  • Back focus: 17.88 19.75 30.96 mm

RF 24-70mm f/2

  • Zoom ratio: 2.75
  • Focal length: 24.70 35.76 67.86 mm
  • F number: 2.06 2.06 2.06
  • Half angle of view: 41.22 31.18 17.68
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 152.24 158.86 179.82 mm
  • Back focus: 12.93 19.69 30.66 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: RF 24-100mm F/4 and RF 24-105mm f/4 IS Lenses For EOS R

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Another Canon patent application for RF mount lenses: RF 24-100mm f/4 and 24-105mm f/4 IS.

Canon patent application 2020-67542A (Japan) discusses optical formulas for an RF 24-100mm f/4 and an RF 24-105mm f/4 IS lens.

RF 24-100mm f/4:

  • Zoom ratio: 4.13
  • Focal length: 24.72 53.96 102.00 mm
  • F number: 4.12 4.12 4.12
  • Half angle of view: 41.19 21.85 11.98
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 133.43 152.26 171.08 mm
  • Back focus: 18.51 32.77 43.74 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: RF 70-300mm f/3.5-5.6 & RF 100-500mm f/5.6-6.4 Lenses (EOS R)

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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:

[via Hi Lows Note]