HK11876A - Improvements in or relating to zoom lens - Google Patents

Improvements in or relating to zoom lens

Info

Publication number
HK11876A
HK11876A HK11876A HK11876A HK11876A HK 11876 A HK11876 A HK 11876A HK 11876 A HK11876 A HK 11876A HK 11876 A HK11876 A HK 11876A HK 11876 A HK11876 A HK 11876A
Authority
HK
Hong Kong
Prior art keywords
relating
zoom lens
zoom
lens
Prior art date
Application number
HK11876A
Original Assignee
Ponder & Best
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
Priority claimed from US00258780A external-priority patent/US3817600A/en
Application filed by Ponder & Best filed Critical Ponder & Best
Publication of HK11876A publication Critical patent/HK11876A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/22—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with movable lens means specially adapted for focusing at close distances
HK11876A 1972-06-01 1976-03-04 Improvements in or relating to zoom lens HK11876A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00258780A US3817600A (en) 1971-06-14 1972-06-01 Zoom lens having close-up focusing mode of operation

Publications (1)

Publication Number Publication Date
HK11876A true HK11876A (en) 1976-03-12

Family

ID=22982092

Family Applications (1)

Application Number Title Priority Date Filing Date
HK11876A HK11876A (en) 1972-06-01 1976-03-04 Improvements in or relating to zoom lens

Country Status (4)

Country Link
DE (1) DE2245451A1 (en)
GB (1) GB1383783A (en)
HK (1) HK11876A (en)
MY (1) MY7600098A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6034732B2 (en) * 1975-11-05 1985-08-10 キヤノン株式会社 short distance zoom lens

Also Published As

Publication number Publication date
DE2245451A1 (en) 1973-12-13
MY7600098A (en) 1976-12-31
GB1383783A (en) 1974-02-12

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