Sony 400mm f/2.8 FE: B&H Photo / Amazon/ Adorama
Patents have been filed for a Sony 800mm f/5.6 and a Sony 400mm f/4 that were filed alongside the Sony 400mm f/2.8 and 500mm f/4. You can check them out below.
overview
- [Publication number] P2025063175
- [Release date] 2025-04-15
- [Title of invention] Optical system and imaging device
- [Application date] 2025-01-14
- [Show division] Division of P 2021524834
[Original application date] 2020-06-01 - [Applicant]
[Identification number] 000002185
[Name or company name] Sony Group Corporation - It is desirable to provide an optical system that is lightweight, easy to handle, and has high optical performance across the entire screen, and an imaging device equipped with such an optical system.
- [Background Art]
[0002]
In recent years, the number of pixels in the image sensors used in interchangeable lens digital camera systems has been increasing, and optical systems are being required to provide correspondingly high image quality. In addition, small and lightweight camera bodies are the norm for the interchangeable lens mirrorless cameras that have become popular in recent years, and optical systems are being required to be smaller and lighter, and such optical systems have been developed (see Patent Document 1). - [0004]
On the other hand, telephoto lenses compatible with large image sensors such as full-size sensors generally end up being large in size, so the optical system is required to have a weight balance with the center of gravity close to that of the camera body, which is suitable for small, lightweight camera bodies in terms of maneuverability. - It is desirable to provide an optical system that
is lightweight, easy to handle, and has high optical performance over the entire screen, and an imaging device equipped with such an optical system.
Example 1
- Focal length: 497.08
- F-number: 4.12
- Half angle of view: 2.47
- Image height: 21.633
- Overall length: 416.13
- Back focal length: 35.63
Example 2
- Focal length: 388.00
- F-number: 2.91
- Half angle of view: 3.15
- Image height: 21.633
- Total length: 380.75
- Back focal length: 28.23
Example 3
- Focal length: 776.00
- F-number: 5.83
- Half angle of view: 1.57
- Image height: 21.633
- Total length: 498.28
- Back Focus: 24.21
Example 4
- Focal length: 581.97
- F-number: 4.12
- Half angle of view: 2.11
- Image height: 21.633
- Overall length: 455.32
- Back Focus: 39.18
Example 10
- Focal length: 388.0
- F-number: 4.12
- Half angle of view: 3.15
- Image height: 21.633
- Overall length: 352.00
- Back focal length: 34.68
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