Canon Patent For Superfast Prime Lenses For The EOS R System

Canon Patent

If we believe the sheer number of Canon patent applications for RF lenses we must think Canon takes their EOS R full frame mirrorless system very seriously.

Canon patent application 2019-197095A (Japan) discusses the optical formulas for three very fast prime lenses for the RF mount. The lenses are 18 mm f/1, 18mm f/1.2, and 25mm f/1.2. 

  • Focal length: 18.51mm
  • F no: 1.24
  • ω : 49.45
  • Image height: 21.64mm
  • Lens length: 129.00mm
  • Back focus: 16.40mm
  • Focal length: 24.59mm
  • F no: 1.24
  • ω : 41.35
  • Image height: 21.64mm
  • Lens length: 129.01mm
  • Back focus: 13.57mm
  • Focal length: 18.50mm
  • F no: 1.03
  • ω : 49.47
  • Image height: 21.64mm
  • Lens length: 150.00mm
  • Back focus: 4.99mm

Don’t expect these lenses to be announced anytime soon.

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 Big Telephoto Lenses, Likely For The Canon EOS R System

Canon Patent

Canon patent application 2019-0339497 (USA) discusses optical formulas for 500mm f/4, 300mm f/2.8, 400mm f//4, and 800mm f/5.6 lenses for the Canon EOS R full frame mirrorless system. At least likely.

The optical formulas discusses in the patent might as well refer to the EF mount. We are not sure about this, though we tend to think the lenses are for the EOS R system. All lenses seem to have internal focusing.

You can download the patent:

CanonPatentTelephoto

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

Source: NL

Canon Patent For High Power Speedlite Flash With Air Cooling

Canon Patent

After the Canon patent application for a lens with built in vacuum cleaner, here is another interesting patent application filed by Canon.

Canon patent application 2019-185021 (Japan) discusses a high power flash unit with a built-in air cooling system. Air is sucked into the flash unit, passes through or around the flash head (the part that gets hottest) and is then put out. Effective cooling system.

An object of the present invention is to provide a lighting device capable of protecting a member related to light emission from heat associated with light emission.  A light source, a first optical member that transmits light emitted from the light source, and a light source that transmits light emitted from the light source are disposed between the light source and the first optical member. The second optical member and the air sucked from the first space, which is the inner space including the light source, on the light source side of the second optical member, and the first optical member and the second optical member. An air blowing mechanism that sends the air to a second space that is a space between the optical members.

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

[via Canon News]

This Canon Patent Puts A Vacuum Cleaner Into A Lens To Keep The Sensor Clean

Canon Patent

Sounds weird? Well, it’s an actual Canon patent application.

Canon patent application 2019-191432 (Japan) discusses a lens design that incorporates the basic principle of a standard vacuum cleaner.

The specially designed lens has a an air flow circuit, as you can easily see in the image on top. Air is pulled in from the outside, hits the sensor, gets sucked away and flows out. Basically, this lens creates a negative pressure around the image sensor, so that dust and other particles don’t stick to the sensor. Quoting the patent literature:

An air intake channel for sucking air from the outside into the interior of the imaging device (200) by the pressure difference generated by the air flow generating means.

canon patent

Sound pretty awesome, and complicated too. From the patent abstract:

[Problem] To provide a dust removing device capable of easily removing dust adhering to an imaging element inside a camera body while confirming an actual influence degree.

[Means for solving] An outer housing having an engaging part for engaging with a lens mount detachably holding an imaging lens, and an inner side of the outer housing ;A communication unit for electrically connecting an inner housing and an imaging device to be arranged, a 1 passage penetrating into the body of the imaging device formed between the outer housing and the inner housing, a 2 passage penetrating into the body of the imaging device formed inside the inner case, and an engaging portion ;The device is provided with at least one optical member arranged on a photographing optical axis when engaged with an imaging device and on the inside of the inner case, an aperture mechanism, and an empty flow generating means arranged at a position not to erode a photographing light flux of the optical member in the 1 passage. A part of the 2 flow path is formed by the periphery of the optical member and an opening of the throttle mechanism

Don’t expect this invention to g to production anytime soon, if ever.

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

[via Canon News]

Canon Patent For RF 24-80mm f/4 Lens For EOS R System

Canon Patent

Canon patent application 2019-191607, spotted by Canon News, discusses optical formulas for a Canon RF 24-80mm f/4 lens for the Canon EOS R system.

  • Focal length 24.72 48.09 82.45
  • F number 4.12 4.12 4.12
  • Half angle of view ( 41.19 24.22 14.70
  • Image height 21.64 21.64 21.64
  • Total lens length 119.50 134.52 149.55
  • BF 13.50 18.71 22.73

The Canon patent also discusses the optical formula for an RF 24-130mm f/4 lens.

  • Focal length 24.72 63.46 131.00
  • F-number 4.12 4.12 4.12
  • Half angle of view (degree) 41.19 18.83 9.38
  • Image height 21.64 21.64 21.64
  • Total lens length 137.50 168.92 200.33
  • BF 13.50 24.03 28.27

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

Canon Patent Application Roundup (dual sensor cam, shrinking MILCs, RF 50mm f/1.8, RF 14-28mm f/2)

Canon Patent

Some new Canon patent applications, all spotted by Canon News.

Canon Patent Application 2019-184921 discusses how to further shrink the size of a mirrorless camera:

An object of the present invention is to provide a technique for suppressing an increase in the size of an image pickup apparatus due to the arrangement of a motor for driving a shutter.


Canon Patent Application 2019-186594 deals with the idea of a camera with dual sensors. Might produce some pretty cool HDR photography:

The half mirror 103 splits the imaging light beam (subject light beam) that has passed through the imaging optical system 102 into a first light beam and a second light beam. The first image sensor 104 and the second image sensor 105 receive the first light beam and the second light beam, respectively. The first image sensor 104 and the second image sensor 105 are constituted by a CCD image sensor, a CMOS image sensor, or the like. The first image sensor 104 and the second image sensor 105 have an image pickup pixel and a focus detection pixel for autofocus using a phase difference detection method. The MPU 106 includes a CPU and a memory that stores a program executed by the CPU, and functions as a control unit that controls the overall operation of the camera body 101. Further, the MPU 106 controls the driving of the photographing lens 102b via the lens driving motor 108.


Can the Canon EOS R system miss a Nifty Fifty lens? It looks like this has not to happen. Canon patent application 2019-184748 discusses optical formulas for an RF 50mm f/1.8 lens. Here comes the Nifty Fifty:

  • F-number 1.85
  • half angle (in degrees) 23.95
  • image height 21.64
  • total lens length 58.55
  • BF 20.94
  • Focal length 48.70
  • F-number 1.85
  • field angle 23.95
  • Image height 21.64
  • total lens length 58.55
  • BF 20.15
  • Focal length 48.70
  • F-number 1.85
  • half angle (in degrees) 23.95
  • Image height 21.64
  • total lens length 58.55
  • BF 16.48
  • Focal length 48.70
  • F-number 1.85
  • half angle (in degrees) 23.95
  • Image height 21.64
  • total lens length 58.55
  • BF 19.38

Canon patent application 2019-0324229 discusses optical formulas for an RF 14-28mm f/2 lens for the EOS R system

  • Focal length 14.42 19.78 27.16
  • F-number 2.06 2.06 2.06
  • Half angle of view 56.32 47.56 38.54
  • Image height 21.64 21.64 21.64
  • Total lens length 164.32 150.29 146.47 
  • BF 16.13 16.13 16.13

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