Several new patents have been found for Canon RF lenses that you can check out below:
Canon 50mm f/1.2, Canon 35mm f/1.8, and Canon 65mm f/1.8 Patents
overview
- [Publication number] P2025149754
- [Release date] 2025-10-08
- [Title of Invention] Optical system and imaging device having the same
- [Application date] 2024-03-26
- [Applicant]
[Identification number] 000001007
[Name] Canon Inc. - An optical system that is compact and has high optical performance is provided.
- BACKGROUND ART In recent
years
, there has been a demand for optical systems used in imaging devices to be compact and have high optical performance. - [0003]
In particular, as a photographic optical system having a half angle of view of about 20 to 30 degrees, Patent Document 1 discloses a double Gauss type optical system.
Example 1
- Focal length: 48.60
- F-number: 1.24
- Half angle of view: 24.00
- Image height: 21.64
- Total length: 85.76
- Back focus: 24.00
Example 2
- Focal length: 35.00
- F-number: 1.84
- Half angle of view: 31.72
- Image height: 21.64
- Total length: 60.67
- Back focus: 22.20
Example 3
- Focal length: 65.00
- F-number: 1.85
- Half angle of view: 18.41
- Image height: 21.64
- Total length: 110.00
- Back focus: 30.00
Example 4
- Focal length: 68.78
- F-number: 1.85
- Half angle of view: 17.46
- Image height: 21.64
- Total length: 115.82
- Back focus: 34.05
Canon 28-400mm F3.5-6.3 IS and Canon 28-400mm f/4-8 IS Patents
overview
- [Publication number] P2025147826
- [Release date] 2025-10-07
- [Title of Invention] Zoom lens and imaging device having the same
- [Application date] 2024-03-25
- [Applicant]
[Identification number] 000001007
[Name] Canon Inc. - [Background Technology]
[0002]
Imaging devices such as digital cameras and video cameras require zoom lenses that are highly compact, cover a wide range from wide-angle to telephoto with a single lens, and have high imaging performance throughout the entire zoom range. - [0003]
In recent years, imaging devices such as cameras using solid-state imaging elements or silver halide film have become more sophisticated, and the entire device has become smaller. Furthermore, the size of the imaging elements used in imaging devices has been miniaturized so that high-resolution images can be obtained. Correspondingly, the photographic optical systems used in imaging devices are required to have resolving power up to high spatial frequencies, which is one of the methods for evaluating resolving power. - [0004]
In addition, in a small-sized image pickup device system, since the image pickup device itself is small, even a zoom lens with a large variable magnification ratio is required to have a small overall optical length. - [0008]
Meanwhile, there is a demand for zoom lenses that have not only high imaging performance but also telephoto capabilities. In particular, there is a strong demand for telephoto zoom lenses with a focal length close to 400 mm. The zoom lens described in Patent Document 1 has a focal length at the telephoto end of less than 320 mm when converted into a 35 mm film format, which does not fully meet the demand for telephoto capabilities, and a zoom lens with a higher zoom ratio is required. - SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a zoom lens that has high imaging performance, realizes a high zoom ratio, and is compact, and an image pickup apparatus having the same.
Example 1
- Focal length: 28.90-388.10
- F-number: 3.37-6.49
- Half angle of view: 33.71-3.16
- Image height: 19.28-21.39
- Total length: 173.50-282.93
- Back focus: 14.73-45.07
Example 4
- Focal length: 28.85-388.00
- F-number: 3.70-7.31
- Half angle of view: 34.03-3.14
- Image height: 19.48-21.29
- Total length: 163.50-263.50
- Back focus: 11.90-41.58
Example 5
- Focal length: 28.85-388.00
- F-number: 4.12-8.24
- Half angle of view: 34.34-3.15
- Image height: 19.71-21.38
- Total length: 161.50-259.50
- Back focus: 12.32-47.08
Example 6
- Focal length: 28.85-388.00
- F-number: 2.99-6.49
- Half angle of view: 34.50-3.19
- Image height: 19.83-21.64
- Total length: 163.50-268.50
- Back focus: 10.92-48.18
Canon 50-150mm f/2.8 and Canon 70-180mm f/2.8 Patents
overview
- [Publication number] P2025149060
- [Release date] 2025-10-08
- [Title of Invention] Zoom lens and imaging device having the same
- [Application date] 2024-03-26
- [Applicant]
[Identification number] 000001007
[Name] Canon Inc. - A compact zoom lens having a small-diameter lens group is provided.
- In a positive-lead zoom lens such as the one described above
, various mechanisms, such as an anti-vibration mechanism for correcting image shake and a mechanism for moving lens groups during focusing and zooming, are arranged closer to the image side than the lens group closest to the object. If the diameter of the lens included in the lens group arranged closer to the image side than the lens group closest to the object becomes larger, the aforementioned mechanisms also become larger, resulting in a larger zoom lens. Therefore, in order to achieve a compact zoom lens, it is necessary to reduce the diameter of each lens group by appropriately setting the refractive power and arrangement of the lens groups that make up the zoom lens. - SUMMARY
OF THE INVENTION It is therefore an object of the present invention to provide a compact zoom lens having a small diameter lens group.
Example 1
- Focal length: 51.50-145.50
- F-number: 2.89-2.91
- Half angle of view: 22.79-8.28
- Image height: 20.53-21.63
- Total length: 176.15-234.55
- Back focal length: 41.56
Example 4
- Focal length: 61.51-174.60
- F-number: 2.89-2.91
- Half angle of view: 19.37-6.91
- Image height: 20.57-21.63
- Total length: 197.48-262.48
- Back focus: 37.73-59.79
Example 5
- Focal length: 66.97-174.59
- F-number: 2.89-2.91
- Half angle of view: 17.90-6.90
- Image height: 20.50-21.63
- Total length: 197.87-262.87
- Back focal length: 37.71
Canon 20-40mm f/2.8 and 10-30mm f/4 APS-C Patents
Focal length 20.63 32.35 48.50
F-number 4.10 4.10 4.12
Half angle of view (°) 42.23 33.36 24.04
Image height 21.64 21.64 21.64
Lens length 118.10 118.10 118.10
BF 11.49 11.49 11.49
Focal length 20.61 29.26 38.72
F-number 2.90 2.90 2.90
Half angle of view (°) 43.64 36.48 29.19
Image height 19.65 21.64 21.64
Lens length 130.70 130.70 130.70
BF 31.45 36.15 40.28
Focal length 10.31 18.51 29.40
F-number 4.10 4.10 4.12
Half angle of view (°) 48.96 36.42 24.92
Image height 13.66 13.66 13.66
Lens length 111.48 111.48 111.48
BF 11.62 11.62 11.62