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Canon Patent: RF 17-70mm Lens For EOS R Camera System

Canon Patent

Might this Canon patent application lead to a product that will actually hit the shelves? We’ve not made up our mind so far.

Canon patent application 2020-012922 (Japan) discusses optical formulas of what might become a future kit lens for the Canon EOS R full frame mirrorless system. The patent literature discusses formulas for two 17-70mm and a 16-60mm lens, and for both the EF and the RF mount. We think the RF mount lens is the one to have an eye on. The discussed lenses:

Canon EF mount:

  • Focal length 17.40 35.00 68.00  
  • F-number 3.33 4.09 5.88  
  • Half-field angle (degree) 51.19 31.72 17.65  
  • Image height 21.64 21.64 21.64  
  • Total lens length 168.42 153.33 168.42  
  • BF 38.32 53.44 84.11  
  • Focal length 16.30 35.00 60.00  
  • F-number 3.31 4.22 5.88  
  • Half angle of view (degrees) 53.01 31.72 19.83  
  • Image height 21.64 21.64 21.64  
  • Total lens length 68.46 153.33 168.42  
  • BF 38.35 56.15 83.82 

Canon RF mount:

  • Focal length 17.40 34.99 67.97  
  • F-number 3.31 4.12 5.88  
  • Half angle of view (degrees) 51.20 31.73 17.66  
  • Image height 21.64 21.64 21.64  
  • Total lens length 168.41 154.99 168.39  
  • BF 8.36 52.48 81.91 

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

Source: Canon News

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