Canon Patent Application For RF 200-800mm f/6-8.5 Lens

Canon Patent Application
View Post

Another Canon patent application for an RF mount lens, that’s a lens for the Canon EOS R full frame mirrorless system.

Hi Lows Note spotted Canon patent application 2020-118816A. The patent application describes the optical formulas for an RF 200-800mm f/6-8.5 lens.

  • Focal length: 199.97 399.99 784.76 mm
  • F number: 6.00 6.80 8.50
  • Half angle of view: 6.17 3.10 1.58
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 285.44 355.65 385.65 mm
  • Back focus: 22.57 43.72 83.86 mm

Interesting: the patent application also discusses optical formulas for a RF 100-500mm f/4.5-7.1 IS USM lens. We guess it might well refer to to just announced RF 100-500mm f/4.5-7.1L IS.

  • Focal length:101.99 199.92 489.99 mm
  • F number: 4.60 5.20 7.20
  • Half angle of view: 11.98 6.18 2.53
  • Image height: 21.64 21.64 21.64 mm
  • Lens length: 222.94 272.65 312.20 mm
  • Back focus: 19.88 36.44 69.71 mm

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

Canon Patent For Cooling Adapter For The RF Mount

Canon Patent
View Post

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:

Source: Canon News

Canon Patent: Electronic Viewfinder With Folded Optics

Folded Optics
View Post

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)

Canon Patent
View Post

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)

Canon Patent
View Post

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

Canon Patent
View Post

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]