Canon Patents

Patent: Lots of optical formula lens patents for the RF mount

Canon is full steam ahead as far as lens development goes, as a whole slew of optical formulas have appeared at patent offices.

First up, the RF mount.

Japan Patent Application 2019-066701

Canon RF 15-35mm f/2.8L

  • Focal distance 15.30mm 24.20mm 34.00mm
  • F number 2.91 2.91 2.91
  • Field angle 54.73° 41.80° 32.47°
  • Image height 21.64mm 21.64mm 21.64mm
  • Whole length of the lens 135.05mm 125.84mm 125.33mm
  • BF 13.00mm 22.20mm 32.26mm

Canon RF 17-70mm f/3.5-5.6

  • Focal distance 17.3mm 35.00mm 68.00mm
  • F number 3.58 4.18 5.85
  • Field angle 51.35° 31.72° 17.65°
  • Image height 21.64mm 21.6mm4 21.64mm
  • Whole length of the lens 142.70mm 138.53mm 143.42mm
  • BF 13.32mm 29.60mm 57.62mm


Japan Patent Application 2019-066654

Canon RF 15-35mm f/4L

  • Focal distance 15.45mm 24.00mm 34.00mm
  • F number 4.12 4.12 4.12
  • Half field angle 54.47° 42.03° 32.47°
  • Image height 21.64mm 21.64mm 21.64mm
  • Whole length of the lens 125.38mm 119.21mm 116.89mm
  • BF 12.00mm 19.66mm 24.40mm

Canon RF 16-35 f/4L

  • Focal distance 16.48mm 24.00mm 34.00mm
  • F number 4.12 4.12 4.12
  • Half field angle 52.70° 42.03° 32.47°
  • Image height 21.64mm 21.64mm 21.64mm
  • Whole length of the lens 127.27mm 116.39mm 111.30mm
  • BF 10.95mm 16.82mm 23.58mm

Japan Patent Application 2019-066653

Canon RF 14-40mm f/4L

  • Focal distance 14.43mm 21.62mm 40.74mm
  • F number 4.12 4.12 4.12
  • Half field angle 56.30° 45.01° 27.97°
  • Image height 21.64mm 21.64mm 21.64mm
  • Whole length of the lens 138.31mm 128.15mm 129.29mm
  • BF 12.84mm 12.84mm 12.84mm

Canon RF 16-40mm f/4L

  • Focal distance 16.41mm 23.12mm 38.80mm
  • F number 4.12 4.12 4.12
  • Half field angle 52.82° 43.10° 29.14°
  • Image height 21.64mm 21.64mm 21.64mm
  • Whole length of the lens 118.88mm 112.53mm 114.89mm
  • BF 12.78mm 12.78mm 12.78mm

mb66energy

EOS 6D MK II
Dec 18, 2011
1,235
158
Germany
www.MichaelBockhorst.de
Canon RF 17-70mm f/3.5-5.6
Is a APS-C lens?
As far as I know the Image Height is the same as image radius and this is roughly 21.5mm = FF compatible.

For me an ingenious ultrawide-to-small-tele range which fits well to a 70-200 option or - if you do not mind the gap - a 100-400 option - therefore it is well suited for a two-lens-two-body solution.
 

peters

EOS T7i
Dec 25, 2017
70
60
SHUT UP AND TAKE MY MONEY!
Ha, I thought the same! Thats an incredible usefull focal lense! For weddings and travel this would be the shit! I love the Tamron 15-30, especialy for travel. But I always miss a little bit more focal lenght for some "normal" portraits or something. 14-40 sounds awesome. f2,8 would be even more awesome, but I guess that would have increased the weight and size to much. =)
 
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SecureGSM

EOS 6D MK II
Feb 26, 2017
1,067
152
As far as I know the Image Height is the same as image radius and this is roughly 21.5mm = FF compatible.

For me an ingenious ultrawide-to-small-tele range which fits well to a 70-200 option or - if you do not mind the gap - a 100-400 option - therefore it is well suited for a two-lens-two-body solution.
Interesting. Canon 5D IV sensor height is 24mm.
Canon 700 FF has a 38.1mm x 20.1mm sensor

Therefore, the lens, seems, is suitable for Canon 700 perfectly. Or... takes care of the x1.7 video crop factor of the new R/RP. ;)
It becomes 29-120 when R/RP in video mode
 
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canonnews

EOS RP
Dec 27, 2017
258
160
Canada
www.canonnews.com
Interesting. Canon 5D IV sensor height is 24mm.
Canon 700 FF has a 38.1mm x 20.1mm sensor

Therefore, the lens, seems, is suitable for Canon 700 perfectly. Or... takes care of the x1.7 video crop factor of the new R/RP. ;)
No, the image height specification is actually the radius the image circle, or 1/2 the diagonal measurement.
21.64 is the standard measurement for a full frame sensor in Canon patent applications.
 

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,067
152
Thank you. Makes sense. I do not shoot video but if I had to, I would consider using this lens on R.
29-120 equivalent in x1.7 crop 4K video mode.