Patents were found for a Canon 70-200mm f/4 IS and APS-C Canon 18-50mm f/4 IS which you can read below:
overview
- [Publication number] P2025082363
- [Release date] 2025-05-29
- [Name of invention] Zoom lens and imaging device
- [Application date] 2023-11-17
- [Applicant]
[Identification number] 000001007
[Name or company name] Canon Inc. - A small and lightweight positive lead type zoom lens is provided.
- The present
invention provides a positive-lead type zoom lens which has a long focal length at the telephoto end, in which various aberrations are well corrected, and which is small and lightweight.
Example 1
- Focal length: 73.68-194.48
- F-number: 4.10
- Half angle of view: 16.36-6.35
- Image height: 21.64
- Total length: 198.01
- Back focus: 49.13-65.78
Example 4
- Focal length: 18.54-52.02
- F-number: 4.10
- Half angle of view: 33.06-14.50
- Image height: 13.66
- Total length: 130.47
- Back Focus: 14.72-14.72
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