Voigtländer NOKTON 50mm f/1.2:
B&H Photo / Amazon
Voigtländer COLOR-SKOPAR 18mm f/2.8:
B&H Photo / Amazon
The Voigtländer NOKTON 50mm f/1.2 and COLOR-SKOPAR 18mm f/2.8 have been announced previously, but the Voigtländer NOKTON 70mm f/1.2 is something new. You can find the patents below:
Voigtländer NOKTON 70mm f/1.2 and Voigtländer NOKTON 50mm f/1.2
overview
- [Publication number] P2025058577
- [Release date] 2025-04-09
- [Name of invention] Imaging lens
- [Application date] 2023-09-28
- [Applicant]
[Identification number] 391044915
[Name or company name] Cosina Co., Ltd. - 2. Description of the Related Art
Conventionally, an inner focus lens as described in Patent Document 1 has been known as a medium telephoto imaging lens. - However
, the above-mentioned conventional imaging lens (inner focus lens) has the following problems. - [0006]
That is, although the objective is to provide a small, lightweight, large-diameter lens, the basic configuration employs an inner focus system, and since focusing is performed from an infinity-focused state to a closest-distance-focused state, there is a drawback in that the overall length of the product becomes long when the shortest shooting distance is ensured. In this case, by using a negative lens with strong power in the focus lens group, it is possible to reduce the amount of lens movement and shorten the shortest shooting distance while suppressing the overall length of the product, but on the other hand, the distance variation of aberration becomes large. - [0007]
In addition, since the maximum lens diameter cannot be made small relative to the aperture ratio and the back focus becomes long, it is difficult to secure space for arranging the lenses, which results in the disadvantage that the entire lens product tends to become large. - [0008]
An object of the present invention is to provide an imaging lens that solves the problems existing in the background art.
Example 1
- Focal length: 48.5
- F-number: 1.23
- Half angle of view: 16.28
Example 3
- Focal length: 72.8
- F-number: 1.23
- Half angle of view: 10.89
Voigtländer COLOR-SKOPAR 18mm f/2.8
overview
- [Publication number] P2025044411
- [Release date] 2025-04-02
- [Name of invention] Optical lens system
- [Application date] 2023-09-20
- [Applicant]
[Identification number] 391044915
[Name or company name] Cosina Co., Ltd. - An optical lens system is provided that is compact and lightweight, improves various aberrations, and provides improved optical performance.
- [Background Technology]
[0002]
Generally, when it comes to lenses for interchangeable lens cameras used in photographic and videography equipment, etc., problems arise in that as the miniaturization of the lenses progresses, component processing errors become larger, optical performance deteriorates, and manufacturing becomes more difficult.
Example 1
- Focal length: 18.54
- F-number: 2.82
- Half angle of view: 37.95
- Image height:
- Overall length: 41.03
- Back Focus: 19.41
