Canon Working To Improve Electronic Viewfinder Optics, Patent Suggests

Electronic Viewfinder

Since Canon’s commitment to mirrorless technology we can expect the company to improve the technology itself. For instance the Electronic Viewfinder.

An Electronic Viewfinder (EVF) is the only mean to give mirrorless camera users an experience that somewhat resembles the classic viewfinder, plus the added bonuses of information that can be shown in the EVF.

Canon patent application 2021-005111 (Japan) discusses how to improve the optical part of an EVF, in particular high magnification and long eye relief. This refers to the optical eyepiece (part of the EVF) used to look at the magnified image on the built-in display.Some people, me included, do not go along well with EVF. The technology discuses in the paper could make the experience better.

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

[via Canon News]

Latest Canon Patents: Stacked Sensor and C700 Shaped Video Camera

Canon Patents

Two new Canon patents for you to speculate about. One is about a stacked imaging sensor, the other one describes a video camera that looks a lot like the C700.

Canon patent application 2021-002807 (Japan) discusses a stacked imaging sensor. Machine translated excerpt from the patent literature:

In the prior art, while the pixel signal can be read out at high speed, the number of vertical output lines in each pixel row increases, so that the number of constant current circuits to be connected increases and the power consumption increases. In particular, the increase in power consumption during Live View shooting greatly affects the number of shots that can be taken. Further, as the vertical output line of each pixel sequence increases, the scale of the correction circuit for correcting the offset to the pixel signal and the gain variation caused by the vertical output line increases. Correction circuit after the image sensor.

If it cannot cope with the increase in the vertical output line, it is necessary to mount a correction circuit on the image sensor. In this case, it is necessary to also mount a memory for storing the correction value, the power due to the read / write of the memory also increases, and the power consumption increases more and more.
The   present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an image pickup apparatus capable of achieving both high-speed reading of a pixel signal and reduction of power consumption.

Doesn’t look like a patent that might hit the market any time soon.


Canon patent application 2021-002871 (Japan) discusses a video camera that appears to look like the Canon EOS C700. The patent literature discusses a better wiring layout.

When the number of connectors is further increased, if the connectors are arranged on the side surface of the camera body, the connectors are likely to come off due to the cable being caught when the camera body is moved while being carried on the shoulder. 
On the other hand, if all the connectors are arranged on the back surface of the camera body, the size of the camera body in the width direction is further increased, and the shape becomes unsuitable for a shoulder-mounted professional digital video camera.


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

Source: Canon News

Canon Patent: Quad Pixel Autofocus Imaging Sensor

Quad Pixel

Dual Pixel AF was true innovation when first launched by Canon on the EOS 70D. It’s just common sense to assume Canon will develop it further. Welcome Quad Pixel AF.

Here is a Canon patent for a Quad Pixel AF imaging sensor, and it is not the first we spotted. Canon patent application 2020-171060 (Japan) discusses the technology. It’s hard to say when we will see the first commercial Quad Pixel AF sensor. But we know it is coming.

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

Canon Patent: RF 50mm f/1.4 and RF 35mm f/1.4 Lenses For EOS R

Canon Patent

Another Canon patent dealing with lenses for the RF mount, i.e. for Canon’s full frame mirrorless system EOS R.

Canon patent application 2020-181071 (Japan) discusses optical formulas for an RF 50mm F1.4 and an RF 35mm f/1.4 lens. This patent application is particularly interesting since 50mm f/1.4 and 35mm f/1.4 are two very classic lenses for a full frame system.

The patent application seems to reveal a modern and complex optical design with front and rear lenses for optical correction. Moreover, we think it has internal focusing, a small size and a very fast auto-focus. Another two lenses that might go into production.

Example 1Example 2Example 3
Focal length51.5048.4748.49
F value1.451.451.85
Half angle of view22.7924.0524.04
Image height21.6421.6421.64
full length95.19108.8491.98
BF11.4911.3911.48
Example 4Example 5
Focal length48.4933.99
F value1.451.45
Half angle of view24.0432.48
Image height21.6421.64
full length116.56131.16
BF13.2312.05

More Canon patent applications are listed here.

[via asobinet.com]

Canon Patent: RF 80mm f/2.8 Macro 1:1 Lens For EOS R System

Canon Patent

And yet another Canon patent for a lens for the EOS R full frame mirrorless camera system,

Canon patent application 2020-181169A (Japan) discusses optical formulas for an RF 80mm f/2.8 Macro 1:1 lens.

  • Focal length: 80.45 mm
  • F number: 2.90
  • Half angle of view: 15.05
  • Image height: 21.64 mm
  • Lens length: 123.69 mm
  • Back focus: 13.72 mm

Interesting lens I have to say. Let’s hope it goes into production.

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

[via Hi Lows Note]

Canon Patent For A Bunch Of RF Mount f/1.8 Prime Lenses

RF Mount

And yet another Canon patent application dealing with RF mount lenses.

Canon patent application 2020-0326505 (USA) discusses optical formula for a bunch of f/1.8 lenses for the EOS R.

  • 105mm f/1.8
  • 130mm f/1.8
  • 150mm f/1.8

Not unlikely these lenses will hit the market, sooner or later.

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