JPH0146847B2 - - Google Patents

Info

Publication number
JPH0146847B2
JPH0146847B2 JP55102194A JP10219480A JPH0146847B2 JP H0146847 B2 JPH0146847 B2 JP H0146847B2 JP 55102194 A JP55102194 A JP 55102194A JP 10219480 A JP10219480 A JP 10219480A JP H0146847 B2 JPH0146847 B2 JP H0146847B2
Authority
JP
Japan
Prior art keywords
group
focal length
groups
focusing
lens
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
JP55102194A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5726816A (en
Inventor
Mitsuaki Horimoto
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.)
Minolta Co Ltd
Original Assignee
Minolta 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
Application filed by Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP10219480A priority Critical patent/JPS5726816A/ja
Priority to US06/254,409 priority patent/US4465343A/en
Publication of JPS5726816A publication Critical patent/JPS5726816A/ja
Publication of JPH0146847B2 publication Critical patent/JPH0146847B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/105—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens with movable lens means specially adapted for focusing at close distances
    • 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)
  • Lenses (AREA)
JP10219480A 1980-05-10 1980-07-24 Wide angle zoom lens system consisting of three components Granted JPS5726816A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10219480A JPS5726816A (en) 1980-07-24 1980-07-24 Wide angle zoom lens system consisting of three components
US06/254,409 US4465343A (en) 1980-05-10 1981-04-15 Zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10219480A JPS5726816A (en) 1980-07-24 1980-07-24 Wide angle zoom lens system consisting of three components

Publications (2)

Publication Number Publication Date
JPS5726816A JPS5726816A (en) 1982-02-13
JPH0146847B2 true JPH0146847B2 (https=) 1989-10-11

Family

ID=14320849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10219480A Granted JPS5726816A (en) 1980-05-10 1980-07-24 Wide angle zoom lens system consisting of three components

Country Status (1)

Country Link
JP (1) JPS5726816A (https=)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58178317A (ja) * 1982-04-12 1983-10-19 Canon Inc ズ−ムレンズの合焦方法
JPS61170716A (ja) * 1985-01-24 1986-08-01 Asahi Optical Co Ltd 広角ズ−ムレンズ
JPH0752256B2 (ja) * 1985-03-27 1995-06-05 株式会社リコー 小型ズ−ムレンズ
JP2552861B2 (ja) * 1987-05-26 1996-11-13 オリンパス光学工業株式会社 変倍レンズ
JP2899005B2 (ja) * 1989-01-30 1999-06-02 キヤノン株式会社 内蔵フォーカスレンズを具えたズームレンズ
JP3590807B2 (ja) * 1995-03-08 2004-11-17 株式会社ニコン ズームレンズ
JPH10293253A (ja) * 1997-04-18 1998-11-04 Fuji Photo Optical Co Ltd ３群ズームレンズ
US6545819B1 (en) 1999-08-31 2003-04-08 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JP3709148B2 (ja) * 2001-03-19 2005-10-19 ペンタックス株式会社 ズームレンズ系
CN112649940B (zh) * 2020-11-11 2025-02-11 珠海市川富光学技术有限公司 一种无反相机使用的超广角镜头

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929146A (https=) * 1972-07-10 1974-03-15
JPS5535323A (en) * 1978-09-04 1980-03-12 Sigma:Kk Super wide-angle zoom lens

Also Published As

Publication number Publication date
JPS5726816A (en) 1982-02-13

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