Canon Patents

Patent: Canon RF 70-400mm f/4.5-5.6L IS USM and more

Canon Rumors
Posted onSep 20, 2019 at 6:55 AM

Canon News has uncovered a patent which details the optical formulas for a couple of super telephoto zooms, including an RF 70-400mm f/4.5-5.6L IS USM, a lens we’re told will appear sometime in the first half of 2020.

In the same patent, Canon also mentions an RF 70-300mm f/4-5.6, a lens we could see appear as a non-L telephoto zoom.

Canon RF 70-300mm f/4-5.6:

  • Focal length:   72.00mm 146.00mm 290.00mm
  • F number: 4.08 4.88 5.67
  • Half angle of view: 16.72° 8.43° 4.27°
  • Image height: 21.64mm 21.64mm 21.64mm
  • Total lens length: 140.00mm 177.20mm 210.00mm
  • BF: 25.13mm 44.86mm 61.65mm

Canon RF 70-400mm f/4.5-5.6L IS USM:

  • Focal length: 72.62mm 168.49mm 389.89mm
  • F number: 4.07 5.10 5.85
  • Half angle of view: 16.59° 7.32° 3.18°
  • Image height: 21.64mm 21.64mm 21.64mm
  • Total lens length: 187.91mm 236.14mm 268.26mm
  • BF: 13.80mm 27.53mm 35.04mm
Canon Rumors

View thread (55 replies)
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proutprout

EOS M50
Nov 25, 2018
35
41
Amazing, so we will have a ton of good lenses and no body. That looks like a amazing sales strategy (helping Sony of course)...
 
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BillB

EOS 6D MK II
May 11, 2017
1,150
385
proutprout said:
Amazing, so we will have a ton of good lenses and no body. That looks like a amazing sales strategy (helping Sony of course)...
Click to expand...
Funny. There are also people that think that there aren't any RF lenses that they are interested in because Canon is producing expensive overweight high end lenses. Well, there is already, the R, the RP, the 35mm, the 24-105, and the 24-240. Some people already have the R or the RP and with the new firmware there will be more. A 70-400 or a 70-300 would be aimed at people who don't want expensive RF glass but want something more than the 24-240.
 
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blackcoffee17

EOS RP
Sep 17, 2014
227
188
The 70-400 or 100-400 is 100% will come sooner or later. It's an essential lens, almost like a 70-200.
What they need is a cheaper kit lens for RP and lower cost bodies. And a competition for Sony 200-600.
 
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blackcoffee17

EOS RP
Sep 17, 2014
227
188
BillB said:
Funny. There are also people that think that there aren't any RF lenses that they are interested in because Canon is producing expensive overweight high end lenses. Well, there is already, the R, the RP, the 35mm, the 24-105, and the 24-240. Some people already have the R or the RP and with the new firmware there will be more. A 70-400 or a 70-300 would be aimed at people who don't want expensive RF glass but want something more than the 24-240.
Click to expand...
I think the 70-400 is more like a high-end 100-400 L type of lens.
 
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BillB

EOS 6D MK II
May 11, 2017
1,150
385
Mr Majestyk said:
All well and good, but still no 150/200-500/600, leaving Canon as the only maker including third party without a long supertele zoom.
Click to expand...
But how many people would be willing to buy a long supertele zoom to put it on an R camera that aren't willing to adapt a cheaper third party zoom? That might be a pretty small niche.
 
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Daner

EOS M50
Aug 15, 2017
31
16
Stockholm
neuroanatomist said:
Looks to be ~1-2 cm shorter than the 100-400L II at both extended and retracted lengths.
Click to expand...
Don't forget to add the length of the adapter to that.

On the other hand, the EF 100-400L II is compatible with the 1.4x and 2x extenders, both individually and in combination. The RF 70-400 has the potential to be smaller and lighter, and will likely have at least slightly improved IQ and IS, but with a considerably higher price and reduced initial versatility (at least until we get RF extenders.)

Of course what I really want is the 200-400 with the built-in 1.4, but it is not currently a realistic option for me when it comes to budget, size, and baggage allowance.
 
GMCPhotographics

GMCPhotographics

EOR R
Aug 22, 2010
1,621
317
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Uk
www.GMCPhotographics.co.uk
neuroanatomist said:
Looks to be ~1-2 cm shorter than the 100-400L II at both extended and retracted lengths.
Click to expand...
Yep...I don't think a little size difference is ever going to be high on the EF Rf debate's critical options list. i'm sure this new lens will sell and sell proportional to how well the Rf mount cameras sell. For migrators from ef to rf or dual system users...there's little in it and hardly worth the side grade costs if one already had an ef 100-400IIL. But new users...sure the new lens will be a wise investment.
 
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SecureGSM

2 x 5D IV
Feb 26, 2017
1,308
302
RF variant may end up being a faster focusing and a better tracking lens due to RF Mount data throughput advantage over the EF Mount.
It could be a substantial factor after all. For some at least.
 
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blackcoffee17

EOS RP
Sep 17, 2014
227
188
BillB said:
But how many people would be willing to buy a long supertele zoom to put it on an R camera that aren't willing to adapt a cheaper third party zoom? That might be a pretty small niche.
Click to expand...
Small niche? I don't think so. Adapting a third party lens is still not the same as native, especially when AF is crucial. And also does not bring any money to Canon.
Sony exec said in an interview that their new 200-600 is very popular. Not hard to see why.
Having 320-900mm (on APS-C) internal zoom lens for $1700 is a great deal.
 
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Maximilian

Maximilian

The dark side - I've been there
Nov 7, 2013
2,630
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Germany
Would be really nice to have some additional 30mm on the short end with the RF 70-400mm f/4-5.6L IS USM.
But only as long as the IQ stays the same (or is even better) as the EF100-400 II.

@Canon Rumors Guy:
Craig, it looks like there is a typo in the thread title as the patent states an f number of 4.07. ;)

Canon Rumors Guy said:
Canon RF 70-400mm f/4.5-5.6L IS USM:
  • Focal length: 72.62mm 168.49mm 389.89mm
  • F number: 4.07 5.10 5.85
Click to expand...
 
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