Canon 20-40mm F4 IS and 26-40mm F4.5-6.3 IS Patents Found

More unique Canon patents continue to be uncovered including the Canon 20-40mm F4 IS and 26-40mm F4.5-6.3 IS new stabilized internal zoom lenses.


  • [Publication number] P2024090416
  • [Release date] 2024-07-04
  • [Name of invention] Zoom lens and imaging device
  • [Application date] 2022-12-23
  • [Applicant]
    [Identification number] 000001007
    [Name or company name] Canon Inc.
  • A compact zoom lens including a lightweight vibration isolation group and high optical performance is provided.
  • [Background Art]
    As a zoom lens having high optical performance at a wide angle and capable of high-speed zooming, there is one having a first lens group having negative refractive power that is immovable (fixed) during zooming, a second lens group having positive refractive power, and a rear group, which are arranged in this order from the object side to the image side. Some zoom lenses also have an anti-shake function that corrects image shake by moving a lightweight lens group other than the first lens group in a direction perpendicular to the optical axis.
  • The present
    invention provides a compact zoom lens which has a wide angle, high optical performance over the entire zoom range, and a lightweight vibration isolation group.

Example 1

  • Focal length: 20.60-39.00
  • F-number: 4.10
  • Half angle of view: 41.06-28.01
  • Image height: 17.95-20.74
  • Overall length: 95.51
  • Back focal length: 12.67

Example 2

  • Focal length: 23.00-36.00
  • F-number: 4.10
  • Half angle of view: 37.97-29.96
  • Image height: 17.95-20.75
  • Overall length: 95.51
  • Back Focus: 14.25

Example 4

  • Focal length: 26.00-40.00
  • F-number: 4.63-6.48
  • Half angle of view: 35.63-27.09
  • Image height: 18.64-20.46
  • Total length: 99.71
  • Back focus: 20.00-33.39

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