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.
overview
- [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]
[0002]
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
Follow Canonaddict on Facebook, X/Twitter, Instagram, and YouTube
via asobinet