A Patent has been found for a new Canon 50mm f/1.2 lens. You can check out the patent below:
overview
- [Publication number] P2025124117
- [Release date] 2025-08-26
- [Title of invention] Optical system and imaging device
- [Application date] 2024-02-14
- [Applicant]
[Identification number] 000001007
[Name] Canon Inc. - To provide a compact, wide-angle optical system that has high image magnification and high optical performance and is also compatible with autofocus.
- [Background Art]
[0002]
Wide-angle optical systems (macro lenses) used for close-up (macro) imaging include those disclosed in, for example, Patent Documents 1 and 2. Many conventional macro lenses have low image magnification, and the macro imaging techniques that can use them are limited. For this reason, there is a demand for macro lenses with high image magnification. - [0004]
Furthermore, like normal lenses, macro lenses are also required to be compact, have a bright F-number, have various aberrations well corrected, and support autofocusing and optical image stabilization to suppress image blur caused by camera shake, etc. To satisfy these requirements, it is necessary to appropriately set the refractive power arrangement within the macro lens and the focal length of each lens, etc. - The present
invention provides a compact, wide-angle optical system that has a high image magnification, high optical performance, and is also compatible with autofocus. - 9 shows the lateral aberration when the shift lens Bs is shifted to correct image blur of about 0.3° at an angle of a paraxial ray from the optical axis in the optical system of Numerical
Example 1. The figure shows the change in aberration at the center position on the image plane and at positions (±) 10 mm above and below in the image height direction.
Example 1
- Focal length: 21.00
- F-number: 2.80
- Half angle of view: 43.60
- Image height: 20.00
- Total length: 116.37
- Back focal length: 17.4
- Imaging magnification (closest): -1.0
Example 3
- Focal length: 23.00
- F-number: 2.80
- Half angle of view: 38.35
- Image height: 18.20
- Total length: 89.33
- Back focal length: 12.51
- Imaging magnification (closest): -1.0
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