GB2344191B - Super wide-angle zoom lens with negative first group - Google Patents

Super wide-angle zoom lens with negative first group

Info

Publication number
GB2344191B
GB2344191B GB0003612A GB0003612A GB2344191B GB 2344191 B GB2344191 B GB 2344191B GB 0003612 A GB0003612 A GB 0003612A GB 0003612 A GB0003612 A GB 0003612A GB 2344191 B GB2344191 B GB 2344191B
Authority
GB
United Kingdom
Prior art keywords
negative
group
zoom lens
super wide
angle zoom
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
GB0003612A
Other versions
GB0003612D0 (en
GB2344191A (en
Inventor
Takashi Enomoto
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 JP32339295A external-priority patent/JP3709000B2/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of GB0003612D0 publication Critical patent/GB0003612D0/en
Publication of GB2344191A publication Critical patent/GB2344191A/en
Application granted granted Critical
Publication of GB2344191B publication Critical patent/GB2344191B/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
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • 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
    • G02B15/16—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 interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/177—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 interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses
    • 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
    • G02B15/1435—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 negative
    • G02B15/143507—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 negative arranged -++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
GB0003612A 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group Expired - Fee Related GB2344191B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP32339295A JP3709000B2 (en) 1995-12-12 1995-12-12 Super wide-angle zoom lens camera
GB9625886A GB2308204B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group

Publications (3)

Publication Number Publication Date
GB0003612D0 GB0003612D0 (en) 2000-04-05
GB2344191A GB2344191A (en) 2000-05-31
GB2344191B true GB2344191B (en) 2000-08-02

Family

ID=26310617

Family Applications (3)

Application Number Title Priority Date Filing Date
GB0003612A Expired - Fee Related GB2344191B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group
GB0003611A Expired - Fee Related GB2344190B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group
GB0003613A Expired - Fee Related GB2344192B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB0003611A Expired - Fee Related GB2344190B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group
GB0003613A Expired - Fee Related GB2344192B (en) 1995-12-12 1996-12-12 Super wide-angle zoom lens with negative first group

Country Status (1)

Country Link
GB (3) GB2344191B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107748429B (en) * 2017-10-24 2023-09-26 辽宁中蓝光电科技有限公司 Large-aperture short TTL 5-piece type optical system and optical lens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196968A (en) * 1977-04-30 1980-04-08 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196968A (en) * 1977-04-30 1980-04-08 Asahi Kogaku Kogyo Kabushiki Kaisha Wide angle zoom lens system
GB1576189A (en) * 1977-04-30 1980-10-01 Asahi Optical Co Ltd Miniature superwide angle zoom lens system

Also Published As

Publication number Publication date
GB2344192B (en) 2000-08-09
GB0003612D0 (en) 2000-04-05
GB2344190A (en) 2000-05-31
GB0003613D0 (en) 2000-04-05
GB0003611D0 (en) 2000-04-05
GB2344191A (en) 2000-05-31
GB2344190B (en) 2000-08-02
GB2344192A (en) 2000-05-31

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20050105

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20071212