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Canon Patent: RF 24-120mm f/2.8 IS & RF 85mm f/1.4 IS

Canon Patent
Drawing from the patent literature

A new Canon patent application for a RF 24-120mm f/2.8 IS and RF 85mm f/1.4 IS lenses.

Canon patent application 2022175604 (Japan, published 11/25/2022) discusses optical formulas for two RF mount lenses, RF 24-120mm f/2.8 IS and RF 85mm f/1.4 IS. From the patent literature:

An object of the present invention is to reduce the size and weight of a movable group decentered with respect to an optical axis, while suppressing the occurrence of chromatic aberration due to the movable group.

Example 1

  • Focal Length: 24.72-116.36
  • F-value: 2.91
  • Half angle of view: 37.12-10.53
  • Image height: 21.64
  • Total length: 178.45-204.02
  • Back focus: 14.59

Example 2

  • Focal length: 82.47
  • F-value: 1.45
  • Half angle of view: 14.70
  • Image height: 21.64
  • Overall length: 126.52
  • Back focus: 13.50

Example 3

  • Focal length: 103.16-387.89
  • F-value: 4.64-7.30
  • Half angle of view: 11.84-3.19
  • Image height: 21.64
  • Total length: 176.10-288.59
  • Back focus: 15.98-63.01

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

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