Patents were found for 3 new lenses from Tamron, including the new Tamron 25-200mm f/2.8-5.6 that development of was announced the other day as well as a Tamron 28-70mm f/2 and a Tamron 25-100mm f/2.8. You can read the patent below:
overview
- [Publication number] P2025131290
- [Release date] 2025-09-09
- [Title of Invention] Zoom lens and imaging device
- [Application date] 2024-02-28
- [Applicant]
[Identification number] 000133227
[Name or company name] Tamron Co., Ltd. - To provide a high-performance zoom lens that has a large aperture ratio, is compact overall, and has excellent correction of various aberrations.
- [Background Art]
[0002]
Imaging devices using solid-state imaging elements, such as digital still cameras and digital video cameras, are widely used. There are various types of such imaging devices, including digital still cameras, digital video cameras, broadcast cameras, surveillance cameras, and vehicle-mounted cameras. For all of these imaging devices, there is a strong market demand for zoom lenses that have a large aperture ratio, a compact overall system, and high optical performance. - [0005]
However, the technology described in Patent Document 1 has difficulty in miniaturizing the zoom lens because the combined positive refractive power of the first to fourth lens groups is weak. Furthermore, the negative refractive power of the second lens group is too strong compared to the positive refractive power of the first lens group, making it difficult to reduce the lens diameter of the first lens group. Thus, in order to solve these problems, the prior art leaves room for further consideration in terms of the power arrangement, imaging magnification, lens configuration, etc. of each lens group.
Example 1
- Focal length: 28.8361-67.9005
- F-value: 2.0600
- Half angle of view: 37.7855-16.8751
- Image height: 21.6330
Example 2
- Focal length: 25.7043-96.9898
- F-value: 2.9082-2.9109
- Half angle of view: 41.9883-11.9873
- Image height: 21.6330
Example 3
- Focal length: 25.7546-193.9096
- F-value: 2.9057-5.8078
- Half angle of view: 42.1987-6.0975
- Image height: 21.6330
Example 4
- Focal length: 25.7546-67.8990
- F-value: 2.9145-2.9111
- Half angle of view: 41.6631-16.8781
- Image height: 21.6330
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