Canon Patent For Various Small/Pancake Prime Lenses For EOS R

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Just small or pancake prime lenses? We are not sure. We are just sure they are small and for the Canon EOS R full frame mirrorless system.

Canon patent application 2019-152683 discusses optical formulas for the following (small) prime lenses:

  • Canon RF 20mm F/2.0
  • Canon RF 35mm F/2.8
  • Canon RF 45mm F/2.8
  • Canon RF 35mm F/2.0

and a 16-35mm f/4 lens, also discussed in the patent application. The lenses appear to be non-L lenses, i.e. less expensive lenses. Are these pancake lenses, in you opinion?

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

Canon Patent Application Seems To Confirm Our Rumor About High Resolution EOS R Model

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Back in August we were tipped about what might be the sensor resolution of the upcoming high resolution Canon EOS R body.

Now a Canon patent application (2019-149607, Japan) surfaced. The patent application discusses an image sensor having a resolution of 83MP. To be more precise, the Canon patent discusses how you can improve focus accuracy based upon different subject colors. Two sensors ate discussed, one having a resolution of 20.75MP, the other of 83.06MP.

We think this Canon patent application could refer to the sensor of the yet not announced high resolution EOS R model (all rumors).

There is another aspect that captured our attention. The other discussed resolution, 20.75MP, is almost exactly 1/4 of 83.06. So is this patent application referring to the same technology, i.e. Quad Pixel AF, as this previously spotted patent application? We do not think, however, that Canon’s high resolution EOS R will have Quad Pixel AF.

An 83MP resolution is also what you get in a full frame sensor if you upscale the 32.5MP of the new APS-C sensor featured on the brand new Canon EOS 90D and EOS M6 Mark II. So, a full frame sensor with 83MP, as we leaked, is definitely a possibility. Add to this that the upcoming high resolution EOS R camera will also (most likely) replace the Canon EOS 5Ds/5Ds R and it appears even more likely.

Might this patent refer to the sensor in Canon’s upcoming high resolution EOS R camera?

Here Is A Bunch Of Canon Patent Applications For EOS R Prime Lenses

Canon Patent
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There is no doubt Canon is investing in their EOS R full frame mirrorless system. Canon patent after Canon patent confirms it.

The Canon patent applications for Canon RF lenses listed below have been published today, August 29, 2019.

  • Canon patent application US-2019-0265439 describes the optical formula for a 85mm f/1.2 lens
  • Canon patent application US-2019-0265441 discusses the optical formula for a 50mm f/1.2 lens
  • Canon patent application US-2019-0265450 discusses the optical formula for a 35mm f/1.8 lens and a 16mm f/1.4 lens

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

Canon Is Working Hard On IBIS, Yet Another Patent Suggests

Ibis
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It seems to be a no brainer that Canon will soon implement IBIS (In Body Image Stabilisation) on their cameras. Another Canon patent shows the company is working hard on this technology.

Canon patent application 2019-0260938 (USA) discusses how to make IBIS and lens IS work together. It’s not the first Canon patent about IBIS/lens IS we spotted, another one is this one. All IBIS related Canon patent applications are listed here.

From the patent abstract:

An image capturing apparatus comprises: a shake detection sensor which detects shaking; a calculation circuit which calculates a first shake correction amount based on a shake signal output from the shake detection sensor; a transmitting circuit which transmits the first shake correction amount to a lens apparatus that comprises first image stabilization apparatus for correcting shaking by moving an optical system; and a lens characteristics correction circuit which performs correction regarding lens characteristics in an image signal obtained by image-capturing in a state in which the first image stabilization apparatus has corrected shaking, based on the first shake correction amount, wherein the lens characteristics correction circuit performs the correction regarding lens characteristics based on the first shake correction amount at a time prior to the image-capturing time by a predetermined time

According to the patent literature, it can be done in the following way:

[0008] The present invention has been made in consideration of the aforementioned problems, and realizes a technique in which, when correction regarding lens characteristics is performed in a camera main body while using a camera shake correction apparatus on an interchangeable lens side, at least the influence of delay in communication between the interchangeable lens and the camera main body is reduced. 

[0009] In order to solve the aforementioned problems, one aspect of the present invention provides an image capturing apparatus, comprising: a shake detection sensor which detects shaking; a calculation circuit which calculates a first shake correction amount based on a shake signal output from the shake detection sensor; a transmitting circuit which transmits the first shake correction amount to a lens apparatus that comprises first image stabilization apparatus for correcting shaking by moving an optical system; and a lens characteristics correction circuit which performs correction regarding lens characteristics in an image signal obtained by image-capturing in a state in which the first image stabilization apparatus has corrected shaking, based on the first shake correction amount, wherein the lens characteristics correction circuit performs the correction regarding lens characteristics based on the first shake correction amount at a time prior to the image-capturing time by a predetermined time. 

[0010] Another aspect of the present invention provides, a control method of an image capturing apparatus comprising: detecting shaking using a shake detection sensor; calculating a first shake correction amount based on a shake signal output from the shake detection sensor; transmitting the first shake correction amount to a lens apparatus that comprises a first image stabilization apparatus that corrects shaking by moving an optical system; and performing correction regarding lens characteristics in an image signal obtained by image-capturing in a state in which the first image stabilization apparatus has corrected shaking based on the first shake correction amount, based on the first shake correction amount at a time prior to the image-capturing time by a predetermined time. 

[0011] Still another aspect of the present invention provides, a non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method of an image capturing apparatus, the method comprising: detecting shaking using a shake detection sensor; calculating a first shake correction amount based on a shake signal output from the shake detection sensor; transmitting the first shake correction amount to a lens apparatus that comprises a first image stabilization apparatus that corrects shaking by moving an optical system; and performing correction regarding lens characteristics in an image signal obtained by image-capturing in a state in which the first image stabilization apparatus has corrected shaking based on the first shake correction amount, based on the first shake correction amount at a time prior to the image-capturing time by a predetermined time. 

[0012] According to the present invention, when correction regarding lens characteristics is performed in a camera main body while using a camera shake correction apparatus on an interchangeable lens side, at least the influence of delay in communication between the interchangeable lens and the camera main body can be reduced. 

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

Canon Patent For 17-70mm Lens For EOS R System

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Here is another Canon patent application for a lens for the EOS R full frame mirrorless system.

Canon patent application 2019-139172 (Japan) discusses optical formulas for a 17-70mm lens for the Canon EOS R system.

  • Focal length 17.40 35.02 68.69   
  • F-number 3.57 4.18 5.85   
  • Half field angle (degrees) 51.19 31.71 17.48   
  • Image height 21.64 21.64 21.64   
  • Total lens length 149.59 133.68 150.50   
  • BF 13.43 27.63 57.99 
  • Focal length 17.10 34.82 72.70   
  • F number 3.57 4.18 5.85   
  • Half angle of view (degree) 51.68 31.85 16.57   
  • Image height 21.64 21.64 21.64   
  • Total lens length 151.00 135.57 157.71  
  • BF 13.13 27.81 63.49 
  • Focal length 18.70 37.55 77.50   
  • F-number 3.57 4.18 5.85   
  • Half angle of view (degree) 49.16 29.95 15.60   
  • Image height 21.64 21.64 21.64   
  • Total lens length 146.50 128.90 147.50   
  • BF 15.19 27.72 59.84   

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

An RF 52-83mm F/1.2 Lens For The EOS R Shows Up In Canon Patent

Canon Patent
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Another weird zoom range spotted in a Canon patent application.

Canon patent application 2019-138941 (Japan) describes the optical formula for a 52-83mm F/1.2 lens for full frame mirrorless systems.

Two embodiments can be found in the patent literature:

  • Zoom ratio: 1.60 
  • Focal length: 51.50 – 64.01 – 82.52 mm
  • Fno.: 1.24
  • Half angle: 22.79 – 18.67 – 14.69  
  • Lens length: 201.66 – 204.48 – 204.68 mm
  • Back focus: 22.89 – 23.95 – 25.47 mm 

And:

  • Zoom ratio: 1.60 
  • Focal length: 51.50 – 64.01 – 82.52 mm
  • Fno.: 1.13
  • Half angle: 22.79 – 18.67 – 14.69  
  • Lens length: 220.20 – 225.05 – 224.20 mm
  • Back focus: 6.51 – 6.53 – 8.64 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]