GB978784A - Objective for photographic enlargers - Google Patents

Objective for photographic enlargers

Info

Publication number
GB978784A
GB978784A GB2895961A GB2895961A GB978784A GB 978784 A GB978784 A GB 978784A GB 2895961 A GB2895961 A GB 2895961A GB 2895961 A GB2895961 A GB 2895961A GB 978784 A GB978784 A GB 978784A
Authority
GB
United Kingdom
Prior art keywords
objective
doublets
components
aug
differ
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
GB2895961A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert NV
Original Assignee
Agfa AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agfa AG filed Critical Agfa AG
Publication of GB978784A publication Critical patent/GB978784A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Abstract

978,784. Optical objectives. AGFAA.G. Aug. 10, 1961 [Aug. 18, 1960], No. 28959/61. Heading G2J. In a wide angle objective consisting of two simple positive inner components and two negative outer doublets, all components being meniscus concave towards a diaphragm between the inner components, the following conditions hold:- (1) the inner elements and the doublets are negative and of a higher dispersion than the elements converted thereto, (2) the outer radii of the objective, R1 and R10, differ at most by 0. 03 f, where f is the focal length, (3) the inner radii of the doublets, R3 and Re, differ at most by 0. 03 f. Optical data are given for two examples of the objective shown. Specification 846,523 is referred to.
GB2895961A 1960-08-18 1961-08-10 Objective for photographic enlargers Expired GB978784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA35371A DE1151395B (en) 1960-08-18 1960-08-18 Enlargement wide angle lens

Publications (1)

Publication Number Publication Date
GB978784A true GB978784A (en) 1964-12-23

Family

ID=6929003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2895961A Expired GB978784A (en) 1960-08-18 1961-08-10 Objective for photographic enlargers

Country Status (3)

Country Link
CH (1) CH389269A (en)
DE (1) DE1151395B (en)
GB (1) GB978784A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482902A (en) * 1965-10-14 1969-12-09 Rodenstock Optik G Modified symmetrical wide-angle objective
JPS51104822A (en) * 1975-03-13 1976-09-17 Asahi Optical Co Ltd 4 gun 6 maikoseinoshashinrenzu

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT201313B (en) * 1957-04-18 1958-12-27 Agfa Camera Werk Ag Wide angle photographic lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482902A (en) * 1965-10-14 1969-12-09 Rodenstock Optik G Modified symmetrical wide-angle objective
JPS51104822A (en) * 1975-03-13 1976-09-17 Asahi Optical Co Ltd 4 gun 6 maikoseinoshashinrenzu

Also Published As

Publication number Publication date
DE1151395B (en) 1963-07-11
CH389269A (en) 1965-03-15

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