Voigtlander 23mm f/1.2 APS-C and 35mm f/1.4 Full Frame Patents Found

11 months ago

overview

[Publication number] P2023090337
[Release date] 2023-06-29
[Title of invention] Optical lens system
[Application date] 2021-12-17
[Applicant]

[Identification number] 391044915

[Name] Cosina Co., Ltd.
An object of the present invention is to provide a compact and high-performance lens by effectively utilizing an aspherical lens.

Example 1

Focal length: 23.6
F-value: 1.22
Half angle of view: 31.5
Image height: 14.2
Overall length: 55.7
Back focus: 14.8

Example 3

Focal length: 34.3
F-value: 1.21
Half angle of view: 32.4
Image height: 21.6
Overall length: 71.8
Back focus: 19.3

Example 4

Focal length: 34.7
F-value: 1.46
Half angle of view: 31.7
Image height: 21.6
Overall length: 60.0
Back focus: 16.1