Prime lens
By designing a fixed-focus lens including three lens groups, only the second lens group moves when focusing, the problems of low focus efficiency and large electric power load in the prior art full-frame camera fixed-focus lens under large aperture are solved, and the imaging effect of efficient focus and low energy consumption is achieved.
Patent Information
- Application Number
- CN202510111393.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-03-21
AI Technical Summary
The existing full-frame camera fixed-focus lenses are difficult to achieve efficient focus under large apertures, and the focus electric load is relatively large, which affects the camera's energy consumption and imaging quality.
A fixed-focus lens including three lens groups is designed, a first lens group with positive power, a second lens group with negative power and a third lens group with positive power in sequence along the central axis direction. Only the second lens group moves along the central axis when focusing, and the other groups are fixed relative to the image surface.
It achieves efficient focusing with a larger aperture (F/1.2~1.3), reduces the focus electric load and improves the camera's energy efficiency and imaging quality.