Canon RF Patents: 16-28mm f/2.8, 16-28mm f/2.8-4, 16-28mm f/4 Lenses

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Canon has filed a new compact zoom lenses patents for RF 16-28mm f/2.8, RF 16-28mm f/2.8-4, RF 16-28mm f/4 lenses for Canon full frame mirrorless cameras.

  • RF 16-28mm f/2.8
  • RF 16-28mm f/2.8-4
  • RF 16-28mm f/4

[Publication number] P2022112179
[Publication date] August 2, 2022
[Patent application title] An optical system and an image pickup apparatus having the same.

  • Example 1 (16-28mm F2.8) 
    Focal length 16.45 21.00 27.50 
    F number 2.88 2.88 2.88 
    Half angle of view (degrees) 52.70 47.08 39.08 
    Real image height 19.00 21.00 21.64 
    Total length 138.01 130.43 127.00 
    14.00 Back focus 14.00
  • Example 2 (16-28mm F2.8-4) 
    Focal length 16.45 21.00 27.50 
    F-number 2.88 3.50 4.00 
    Half angle of view (degrees) 52.70 46.87 38.91 Actual 
    image height 19.00 21.00 21.64 
    Total length 121.56 117.78 117.78 117.50 
    Back focus 14.51 14.21 14.50
  • Example 3 (16-28mm F4) 
    Focal length 16.45 21.00 27.50 
    F number 4.10 4.10 4.10 
    Half angle of view (degrees) 52.69 47.04 39.09 
    Real image height 19.00 21.00 21.64 
    Total length 124.60 121.27 121.49 
    Back focus 14.08 14.08

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