GB2265991B - High zoom-ratio lens system for covering wide angle for compact camera - Google Patents

High zoom-ratio lens system for covering wide angle for compact camera

Info

Publication number
GB2265991B
GB2265991B GB9313451A GB9313451A GB2265991B GB 2265991 B GB2265991 B GB 2265991B GB 9313451 A GB9313451 A GB 9313451A GB 9313451 A GB9313451 A GB 9313451A GB 2265991 B GB2265991 B GB 2265991B
Authority
GB
United Kingdom
Prior art keywords
lens system
wide angle
high zoom
compact camera
covering wide
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 - Fee Related
Application number
GB9313451A
Other versions
GB2265991A (en
GB9313451D0 (en
Inventor
Takayuki Ito
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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 JP1110849A external-priority patent/JP2777905B2/en
Priority claimed from JP2029210A external-priority patent/JP3007649B2/en
Priority claimed from GB9009651A external-priority patent/GB2233113B/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB9313451D0 publication Critical patent/GB9313451D0/en
Publication of GB2265991A publication Critical patent/GB2265991A/en
Application granted granted Critical
Publication of GB2265991B publication Critical patent/GB2265991B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G02B15/143—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 having three groups only
    • G02B15/1431—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 having three groups only the first group being positive
    • G02B15/143103—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 having three groups only the first group being positive arranged ++-
GB9313451A 1989-04-28 1993-06-30 High zoom-ratio lens system for covering wide angle for compact camera Expired - Fee Related GB2265991B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1110849A JP2777905B2 (en) 1989-04-28 1989-04-28 High-power zoom lens for compact cameras covering a wide angle
JP2029210A JP3007649B2 (en) 1990-02-08 1990-02-08 High-magnification zoom lens for compact cameras covering a wide angle
GB9009651A GB2233113B (en) 1989-04-28 1990-04-30 High zoom-ratio lens system for covering wideangle for compact camera

Publications (3)

Publication Number Publication Date
GB9313451D0 GB9313451D0 (en) 1993-08-11
GB2265991A GB2265991A (en) 1993-10-13
GB2265991B true GB2265991B (en) 1993-12-22

Family

ID=27265065

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9313451A Expired - Fee Related GB2265991B (en) 1989-04-28 1993-06-30 High zoom-ratio lens system for covering wide angle for compact camera

Country Status (1)

Country Link
GB (1) GB2265991B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0172009B1 (en) * 1994-09-26 1999-05-01 이대원 Wide angle zoom lens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153511A (en) * 1986-12-18 1988-06-25 Olympus Optical Co Ltd Compact and high variable power zoom lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153511A (en) * 1986-12-18 1988-06-25 Olympus Optical Co Ltd Compact and high variable power zoom lens
US4773744A (en) * 1986-12-18 1988-09-27 Olympus Optical Co., Ltd. Compact zoom lens system with a high zooming ratio

Also Published As

Publication number Publication date
GB2265991A (en) 1993-10-13
GB9313451D0 (en) 1993-08-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050430