New Patents: Canon RF 18mm F1.8, 20mm F1.4 and 24mm F1.8 lens

Canon has applied for a patent for a wide-angle lens (18mm, 20mm, 21mm, 24mm, 28mm in the examples) for  RF mount.

• Example 1 (18mm F1.8)
  Focal length 18.54
  F number 1.85
  Half angle of view (°) 49.41
  Image height 21.64
  Lens total length 107.66
  BF 14.09

• Example 2 (24mm F1.8)
  Focal length 23.83
  F number 1.85
  Half angle of view (°) 42.24
  Image height 21.64
  Lens total length 104.66
  BF 15.90

• Example 4 (20 mm F1.4)
  Focal length 20.48
  F number 1.44
  Half angle of view (°) 46.56
  Image height 21.64
  Lens total length 124.66
  BF 13.16

• Example 5 (21mm F1.8)
  Focal length 21.36
  F number 1.85
  Half angle of view (°) 45.37
  Image height 21.64
  Lens total length 105.66
  BF 14.88

• Example 8 (28 mm F1.8)
  Focal length 28.08
  F number 1.85
  Half angle of view (°) 37.61
  Image height 21.64
  Lens total length 92.66
  BF 12.16

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