Canon Patent For 35mm f/1.4, 85mm f/1.2 and 70-200mm f/2.8 Lenses for Full Frame Cameras

Canon Patent

Hi Lows Note spotted a Canon patent application (2019-45631A) describing optical formulas for a 35mm f/1.4 and 85mm f/1.2 for full frame DSLRs, and for a 70-200mm f/2.8 for full frame mirrorless cameras (the EOS R system).

Focal length: 34.31 mm
F number: 1.45
Angle of view: 32.24
Image height: 21.64 mm
Lens length: 139.98 mm
Back focus: 39.01 mm

Focal length: 85.00 mm
F number: 1.24
Angle of view: 14.28
Image height: 21.64 mm
Lens length: 123.50 mm
Back focus: 39.70 mm

Zoom ratio: 2.71
Focal length: 72.00 ~ 134.99 ~ 194.94 mm
F number: 2.91 ~ 2.91 ~ 2.98
Angle of view: 16.73 ~ 9.11 ~ 6.33
Image height: 21.64 mm
Lens length: 172.73 ~ 219.96 ~ 231.71 mm
Back focus: 14.37 ~ 18.40 ~ 28.12 mm

These Are The More Exotic Lenses and Adapters On Display At CP+ 2019

Cp+ 2019

Courtesy of DC Watch, here are images of lenses and adapters made by some less known manufacturer.

Above: Zhong Yi Optics Speedmaster 50mm F/0.95 III, will be released for the Canon EOS R and Nikon Z systems.

A Speedmaster 50mm F/0.95 C will also be released. Guess the “C” stay for Cinema.

Various adapters from K&L Concept, EOS R and Nikon Z inclusive.

Commlite adapters, here too for EOS R.

Manual Focusing Kipon ELEGANT lenses mounted on Canon EOS R and Nikon Z.

KamLan is a Taiwanese lens manufacturer making lenses mainly for APS-C and 4/3. In the image above you see the 50mm F/1.1 Mark I (left) and 50mm F/1.1 Mark II (right).

KamLan 8mm F/3 fisheye lens

The Lomography Lomogon 32 mm F/2.5 Art lens (Canon EF and Nikon F mounts, in the image above mounted on Sony via adapter).

Chinese lens manufacturer Kapkur displayed a manual focus 85mm F/1.4 lens for Canon EF mount.

And a fisheye lens too, the Kapkur 6.5mm F/3.5.

More images at DC Watch

Latest Canon Patent Round-Up (Telephoto Primes, Defocus Smoothing, EOS R Lenses)

Canon Patent

Canon patent application in Japan 2019-032390 and 2019-032391 discuss optical formulas for various telephoto prime lenses:

Focal distance 294.00 
F number 2.91 
a half field angle (degree) — 4.21
image height 21.64 
Whole length of the lens 276.40 
BF 65.35 

Focal distance 392.00 
F number 2.90 
a half field angle (degree) — 3.16 
Image height 21.64 
Whole length of the lens 371.25 
BF 69.92

Focal distance 490.00 
F number 4.12 
a half field angle (degree) — 2.53 
Image height 21.64 
Whole length of the lens 410.77 
BF 66.03

Focal distance 588.00 
F number 4.12 
a half field angle (degree) — 2.11 
Image height 21.64 
Whole length of the lens 474.78 
BF 80.59

Focal distance 784.00 
F number 5.80 
a half field angle (degree) — 1.58 
Image height 21.64 
Whole length of the lens 484.53 
BF 75.94

Canon patent application in Japan (2019-028212) discusses another optical formula for an RF 70-300mm lens for the EOS R system:

focal length 71.53 132.28 293.70 
F-number 4.16 5.18 5.83 
half-field angle (degree) 16.83 9.29 4.21 
Image height 21.64 21.64 21.64 
Lens total length 179.52 216.99 250.81 
BF 48.94 22.62 18.05 

Canon patent application in Japan (2019-028258) discusses the optical formula for what might be kit lenses for an APS-C DSLR:

focal length 17.00 45.29 130.97
F number 3.71 5.63 6.30
half angle of view (degree) 38.78 16.78 5.95
image height 13.66 13.66 13.66
total lens length 88.79 109.43 136.79
BF Air) 9.50 32.69 41.15

focal length 17.00 48.75 130.97
F number 3.59 6.05 6.30
Half angle of view 38.78 15.65 5.95
Image height 13.66 13.66 13.66
Lens total length 93.09 114.59 143.09
BF 11.62 39.19 46.30

focal length 18.45 46.95 80.00
F number 3.25 4.48 5.60
Half angle of view 36.52 16.22 9.69
Image height 13.66 13.66 13.66
Lens total length 98.76 113.68 139.63
BF 9.45 9.45 9.45

focal length 17.00 44.95 130.97
F number 3.88 5.96 6.30
half angle of view (degree) 38.78 16.90 5.95
image height 13.66 13.66 13.66
total lens length 88.59 109.18 136.47
BF 11.16 34.60 41.37

focal length 18.14 30.19 45.00
F-number 2.06 3.00 5.00
half-field angle (degree) 33.66 23.99 16.62
Image height 12.08 13.43 13.43
total lens length 92.24 97.67 90.17
BF 13.96 9.90 3.00

Canon patent applications via Canon News.

Canon Patent For 400mm, 600mm and 800mm Telephoto Lenses With Diffractive Optical Elements

Canon Patent

Hi Lows Note spotted a Canon patent application (2019-028317) for 400mm f/4, 600 mm f/4, and 800 mm f/5.6 telephoto lenses with DOE (Diffractive Optical Elements).

Focal distance 582.00 
F number 4.12 
Half field angle (degree) 2.13 
Image height 21.64 
Whole length of the lens 394.25 
BF 62.79 

Focal distance 405.00 
F number 4.12 
Half field angle (degree) 3.06 
Image height 21.64 
Whole length of the lens 330.16 
BF 50.46 

Focal distance 795.00 
F number 5.60 
Half field angle (degree) 1.56 
Image height 21.64 
Whole length of the lens 490.24 
BF 105.13 

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production in the next few years are these:

Latest Canon Patent Applications (Pop-UP EVF, Resin Mount, Hybrid EVF, Lenses and Sensor)

Canon Patent Applications

Here are the latest Canon patent applications.

Canon patent application 2019-023685 describes a pop-up EVF (Electronic ViewFinder). From the patent literature:

Since a display-device part and the eyepiece for magnifying it are needed EVF, when mounting on a compact camera, the place to arrange serves as problem. Since the large-sized external display device serves as a form which covers a camera back substantially, in order to look into EVF from the back face of a camera, an external display device must be avoided and arranged. A camera will enlarge only the part of EVF then. When it is going to avoid enlargement, an external display device must be made small and usability becomes less good. In order to correspond to these problems, there are some on which pop-up type EVF like the description to a Patent document 1 is mounted. 

EVF loading is realized without [ when using this inside a camera, being stored at the time of EVF non-use, without it functions as a finder by making it jump out to camera outside and miniaturizes an external display device, and ] enlarging a camera. 

Canon patent application 2019-023688 describes a resin (plastics) made lens mount:

Conventionally, although the camera mount of the camera with interchangeable lenses comprised a metallic material in consideration of durability, reliability and accuracy, etc., the camera mount which comprises a metallic material had the problem that things and component cost with heavy weight became high. 

The camera body which has the camera mount which comprised resin materials, such as a plastic, by improvement in the durability of engineering plastics or reliability and progress of forming technique is produced commercially these days. A weight saving and component cost reduction are attained because camera mount becomes a resin material.

Canon patent application 2019-020538 describes a hybrid optical and electronic viewfinder:

The present invention relates to the single-lens reflex camera which has an optical finder and an electronic finder, and relates to the change of the finder to which seeds responded as for the electronic device with which the especially single-lens reflex camera was equipped, or the optical element. 

In recent years, the single-lens reflex camera which has a finder which has arranged the optical-path dividing prism in the optical path of an optical finder in a single-lens reflex camera, and has arranged the display device which becomes the equivalent position from a liquid crystal panel etc. optically with a focus detecting plate is known. 

Canon patent application 2019-020679 describes the optical formula for a RF 100-400mm lens (for EOS R systems):

Focal distance 102.21 195.97 389.86 ​
F number 3.83 4.93 5.85 
Half angle of view (degree) 11.95 6.30 3.18 
Image height 21.64 21.64 21.64 
Lens total length 204.85 250.29 291.30 
BF 4.31 31.68 97.49

Canon patent application 2019-017065 describes a photon counting image sensor.

Canon patent application 2019-0052781 discusses how to improve the reliability of tilt-shift lenses.

That’s all for now; patent round-up source: Canon News

More Canon patent applications are listed here. Some particularly interesting patent applications we think might get into production in the next few years are these:

Sigma Lenses Work Without Issues On The Canon EOS R, Company Assures

Sigma 14-24mm

Sigma lenses work without issues on the Canon EOS R when used with Canon’s EF-EOS R adapter. For more details see the press release below.

Sigma press release:

[Updated Information] Operating conditions of the Canon “EOS R” and SIGMA’s interchangeable lenses for Canon mount

Thank you for purchasing and using our products.

We would like to share the results of our further investigations regarding the operating conditions of the Canon “EOS R” and SIGMA’s interchangeable lenses for Canon mount.

When SIGMA’s interchangeable lenses in the current product lineup, listed below, are used in combination with the Canon “EOS R” and their “Mount Adapter EF-EOS R” or “Control Ring Mount Adapter EF-EOS R”, both AF and AE operate without any issues.
Furthermore, lenses which incorporate Optical Stabilizer (OS) will work with the OS function properly in effect.

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