Canon Patent For Cooling Adapter For The RF Mount

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Did Canon foresee the EOS R5/R6 overheating hysteria? A Canon patent suggests so.

Canon patent application 2019-186871 (Japan) describes an adapter for the Canon RF mount which seems to have the peculiar aim to cool down the camera body (item 100 in the image above).

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

Canon Patent: Electronic Viewfinder With Folded Optics

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:

Sigma Patent: 70-200mm f/4 DG DN OS Lens For FF Mirrorless Cameras

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A Sigma patent application for a 70-200mm lens for full frame mirrorless cameras. Let’s hope for the EOS R system too.

Sigma patent application 2020-86133A discusses the optical formula for a 70-200mm DG DN OS lens , “OS” being Sigma’s denomination for in lens image stabilization.

  • Zoom ratio: 2.68
  • Focal length: 72.50 118.13 193.95 mm
  • F number: 4.00 3.99 4.00
  • Angle of view: 33.22 20.36 12.38
  • Image height: 21.63 21.63 21.63 mm
  • Lens length: 200.60 200.60 200.60 mm

Canon patent applications are listed here.

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]