GB785573A - - Google Patents
Info
- Publication number
- GB785573A GB785573A GB785573DA GB785573A GB 785573 A GB785573 A GB 785573A GB 785573D A GB785573D A GB 785573DA GB 785573 A GB785573 A GB 785573A
- Authority
- GB
- United Kingdom
- Prior art keywords
- negative
- objective
- positive
- airspaced
- focal length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Lenses (AREA)
Abstract
785,573. Photographic objectives. SCHNEIEDER. M. C. Nov. 14. 1955 [Feb. 8, 1955], No. 32462/55. Class 97(1) A variable focal length objective consists of a main objective formed of three positive and a negative lens airspaced from one another as a modified Taylor triplet and on the long conjugate side a supplementary system consisting of a front positive member formed of two airspaced components, a negative member substantially plano-concave or shaped as a negative meniscus and formed of two lenses of opposite refractive powers cemented together and a single positive lens adjacent the main objective, the front positive member and the negative member being axially displaceable to vary the focal length. Numerical data for one example of the objective shown are given.
Publications (1)
Publication Number | Publication Date |
---|---|
GB785573A true GB785573A (en) | 1900-01-01 |
Family
ID=1752056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB785573D Expired GB785573A (en) |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB785573A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1203488B (en) * | 1957-10-02 | 1965-10-21 | Taylor Taylor & Hobson Ltd | Lens with variable focal length |
DE3245235A1 (en) * | 1981-12-08 | 1983-06-16 | Olympus Optical Co., Ltd., Tokyo | Varifocal lens |
-
0
- GB GB785573D patent/GB785573A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1203488B (en) * | 1957-10-02 | 1965-10-21 | Taylor Taylor & Hobson Ltd | Lens with variable focal length |
DE3245235A1 (en) * | 1981-12-08 | 1983-06-16 | Olympus Optical Co., Ltd., Tokyo | Varifocal lens |
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