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

Canon Rumors Guy

EOS 1D MK II
Jul 20, 2010
7,642
334
Canada
www.canonrumors.com
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...
Continue reading...
 
Last edited:

mb66energy

EOS 6D MK II
Dec 18, 2011
1,254
173
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
78
68
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. =)
 
  • Like
Reactions: SwissFrank

SecureGSM

EOS 6D MK II
Feb 26, 2017
1,132
184
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
 
  • Like
Reactions: FramerMCB

canonnews

EOS RP
Dec 27, 2017
301
246
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
1,132
184
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.