- Patent Title: Converter lens, interchangeable lens, and image pickup apparatus
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Application No.: US17814772Application Date: 2022-07-25
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Publication No.: US11966099B2Publication Date: 2024-04-23
- Inventor: Shinya Okuoka
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: CANON U.S.A., INC. IP Division
- Priority: JP 18121364 2018.06.26
- Main IPC: G02B9/04
- IPC: G02B9/04 ; G03B17/14 ; H04N23/55
Abstract:
A converter lens includes three or more negative lenses and increases the focal length of an entire system, in which an average refractive index Ndave at the d-line (wavelength of 587.56 nm) of a material of all the negative lenses included in the converter lens is defined.
Public/Granted literature
- US20220357559A1 CONVERTER LENS, INTERCHANGEABLE LENS, AND IMAGE PICKUP APPARATUS Public/Granted day:2022-11-10
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