Interesting patent filed by Canon. If I got it right, this refers to an optical viewfinder with a built-in image sensor. I did not completely understand what this is for. The parts circled in red in the image above show where the image sensors are. The sensor at (24) is what we know from current DSLR designs. The sensor at (22) is placed immediately above the viewfinder. As usual with patents, I am glad for any additional interpretation.

• Patent Publication No. 2016-177038
  • Published 2016.10.6
  • Filing date 2015.3.19
• Canon patent
  • A finder optical system having a reduction optical system and the imaging device
  • Reduction optical system for forming an object image formed on the focusing plate an imaging element

[via Egami]

 

Canon filed a patent for a 300mm F2.8 IS ASPH lens.

According to the present invention, at the telephoto lens, a cemented lens and a non-spherical surface consisting of a glass material having an anomalous dispersion characteristic that used in the appropriate refractive power where appropriate, in the chromatic aberration of the correction and the entire optical system it is possible to achieve both of the reduction in size and weight to provide an optical system that has been made.

• Patent Publication No. 2016-173439
  • Published 2016.9.29
  • Filing date 2015.3.17
• Example
  • Focal length 292.46
  • F-number 2.91
  • Angle of view 4.23
  • Image height 21.64
  • Overall length of the lens 273.95
  • BF 60.81

[via Egami]

 

Canon patent for a 10.2-30.6mm f/2.0-4.9 lens for cameras featuring an 1″ sensor, that’s the Powershot G line-up.

• Patent Publication No. 2016-161889
  • Published 2016.9.5
  • Filing date 2015.3.5
• Example 1
  • Zoom ratio 2.85
  • Focal length 10.50 19.76 29.90
  • F-number 2.06 4.30 5.01
  • Half angle of view (degrees) 31.44 21.76 14.78
  • The image height 6.42 7.89 7.89
  • Overall length of the lens 52.34 49.73 53.96
  • BF 7.48 5.72 5.08
• Canon patent
  • Inner focus
  • Vibration control

[via Egami]