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GB2269683B - Zoom lens system for use with a compact camera having a wide coverage of angles - Google Patents

Zoom lens system for use with a compact camera having a wide coverage of angles

Info

Publication number
GB2269683B
GB2269683B GB9320917A GB9320917A GB2269683B GB 2269683 B GB2269683 B GB 2269683B GB 9320917 A GB9320917 A GB 9320917A GB 9320917 A GB9320917 A GB 9320917A GB 2269683 B GB2269683 B GB 2269683B
Authority
GB
United Kingdom
Prior art keywords
angles
zoom lens
lens system
wide coverage
compact camera
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
GB9320917A
Other versions
GB2269683A (en
GB9320917D0 (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 JP31593389A external-priority patent/JP2842642B2/en
Priority claimed from GB9025215A external-priority patent/GB2240637B/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB9320917D0 publication Critical patent/GB9320917D0/en
Publication of GB2269683A publication Critical patent/GB2269683A/en
Application granted granted Critical
Publication of GB2269683B publication Critical patent/GB2269683B/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
    • G02B15/142—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 two groups only
    • 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
    • G02B15/142—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 two groups only
    • G02B15/1421—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 two groups only the first group being positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
GB9320917A 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles Expired - Fee Related GB2269683B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP30257089 1989-11-21
JP31593389A JP2842642B2 (en) 1989-12-05 1989-12-05 Zoom lens for compact cameras covering a wide angle
GB9025215A GB2240637B (en) 1989-11-21 1990-11-21 Zoom lens system for use with a compact camera having a wide coverage of angles

Publications (3)

Publication Number Publication Date
GB9320917D0 GB9320917D0 (en) 1993-12-01
GB2269683A GB2269683A (en) 1994-02-16
GB2269683B true GB2269683B (en) 1994-05-18

Family

ID=27265380

Family Applications (3)

Application Number Title Priority Date Filing Date
GB9320917A Expired - Fee Related GB2269683B (en) 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles
GB9320915A Expired - Fee Related GB2269912B (en) 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles
GB9320916A Expired - Fee Related GB2269913B (en) 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB9320915A Expired - Fee Related GB2269912B (en) 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles
GB9320916A Expired - Fee Related GB2269913B (en) 1989-11-21 1993-10-11 Zoom lens system for use with a compact camera having a wide coverage of angles

Country Status (1)

Country Link
GB (3) GB2269683B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100189064B1 (en) * 1996-08-30 1999-06-01 이해규 Small size wide angle zoom lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918798A (en) * 1973-02-13 1975-11-11 Canon Kk Zoom lens having two diaphragms
US4190323A (en) * 1977-05-13 1980-02-26 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens with high zoom ratio

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682860A (en) * 1980-03-14 1987-07-28 Canon Kabushiki Kaisha Ultrasmall size zoom lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918798A (en) * 1973-02-13 1975-11-11 Canon Kk Zoom lens having two diaphragms
US4190323A (en) * 1977-05-13 1980-02-26 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens with high zoom ratio

Also Published As

Publication number Publication date
GB2269913B (en) 1994-05-11
GB2269683A (en) 1994-02-16
GB9320915D0 (en) 1993-12-01
GB2269912B (en) 1994-05-11
GB2269913A (en) 1994-02-23
GB2269912A (en) 1994-02-23
GB9320916D0 (en) 1993-12-01
GB9320917D0 (en) 1993-12-01

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Legal Events

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

Effective date: 20031121