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

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

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]
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