GB785573A - - Google Patents

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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
Application number
Publication date
Publication of GB785573A publication Critical patent/GB785573A/en
Expired legal-status Critical Current

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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.
GB785573D Expired GB785573A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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