Patents were found for a Sigma 28mm f/1.2 and a Sigma 24mm f/1.2. You can check out the patent below:
overview
- [Publication number] JP2025-167449 (P2025-167449A)
- [Release date] November 7, 2025 (2025.11.7)
- [Title of invention] Imaging optical system
- [Application date] April 26, 2024 (2024.4.26)
- [Applicant]
[Identification number] 000131326
[Name or company name] Sigma Corporation- An imaging optical system is provided that has a large aperture ratio, yet achieves both high imaging performance and compactness and light weight, has a lightweight focus lens group, and suppresses breathing during focusing.
Example 1
- Focal length: 33.98
- F-number: 1.24
- Angle of view: 65.29
- Image height: 21.63
- Total length: 129.30
- Back focus: 18.0998
Example 3
- Focal length: 28.80
- F-number: 1.24
- Angle of view: 75.31
- Image height: 21.63
- Total length: 132.26
- Back focal length: 17.5511
Example 5
- Focal length: 24.70
- F-number: 1.24
- Angle of view: 84.14
- Image height: 21.63
- Total length: 133.63
- Back focal length: 18.4823
Example 6
- Focal length: 36.05
- F-number: 1.45
- Angle of view: 62.10
- Image height: 21.63
- Total length: 115.00
- Back focal length: 18.7543
Sigma lenses can be found at B&H Photo and Amazon
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