JPH0320735B2 - - Google Patents

Info

Publication number
JPH0320735B2
JPH0320735B2 JP60012052A JP1205285A JPH0320735B2 JP H0320735 B2 JPH0320735 B2 JP H0320735B2 JP 60012052 A JP60012052 A JP 60012052A JP 1205285 A JP1205285 A JP 1205285A JP H0320735 B2 JPH0320735 B2 JP H0320735B2
Authority
JP
Japan
Prior art keywords
lens
lens group
group
focal length
negative
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 - Lifetime
Application number
JP60012052A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61170716A (ja
Inventor
Satoru Tachihara
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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP60012052A priority Critical patent/JPS61170716A/ja
Priority to US06/822,161 priority patent/US4735493A/en
Publication of JPS61170716A publication Critical patent/JPS61170716A/ja
Publication of JPH0320735B2 publication Critical patent/JPH0320735B2/ja
Granted 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
    • G02B15/1435—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)
JP60012052A 1985-01-24 1985-01-24 広角ズ−ムレンズ Granted JPS61170716A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP60012052A JPS61170716A (ja) 1985-01-24 1985-01-24 広角ズ−ムレンズ
US06/822,161 US4735493A (en) 1985-01-24 1986-01-24 Wipe-angle zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60012052A JPS61170716A (ja) 1985-01-24 1985-01-24 広角ズ−ムレンズ

Publications (2)

Publication Number Publication Date
JPS61170716A JPS61170716A (ja) 1986-08-01
JPH0320735B2 true JPH0320735B2 (en, 2012) 1991-03-20

Family

ID=11794828

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60012052A Granted JPS61170716A (ja) 1985-01-24 1985-01-24 広角ズ−ムレンズ

Country Status (2)

Country Link
US (1) US4735493A (en, 2012)
JP (1) JPS61170716A (en, 2012)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818082A (en) * 1988-05-27 1989-04-04 Eastman Kodak Company Compact wide-angle close-focus SLR zoom lens
JP3081698B2 (ja) * 1991-12-24 2000-08-28 オリンパス光学工業株式会社 ３群ズームレンズ
JP3590807B2 (ja) * 1995-03-08 2004-11-17 株式会社ニコン ズームレンズ
JP3709000B2 (ja) * 1995-12-12 2005-10-19 ペンタックス株式会社 超広角ズームレンズカメラ
JP3451471B2 (ja) * 1996-09-09 2003-09-29 株式会社リコー 小型ズームレンズ
US6191896B1 (en) * 1997-09-04 2001-02-20 Canon Kabushiki Kaisha Zoom lens and optical apparatus having the same
JP3486352B2 (ja) 1998-10-26 2004-01-13 ペンタックス株式会社 広角ズームレンズ系
JP2000131611A (ja) 1998-10-26 2000-05-12 Asahi Optical Co Ltd 広角ズームレンズ系
JP4333401B2 (ja) 2004-02-19 2009-09-16 セイコーエプソン株式会社 小型ズームレンズ
KR100711116B1 (ko) * 2005-04-11 2007-04-24 후지논 가부시키가이샤 줌렌즈
KR100692571B1 (ko) * 2005-06-30 2007-03-13 삼성전자주식회사 다용도 광학계
JP5397063B2 (ja) * 2009-07-22 2014-01-22 株式会社リコー 撮像光学系およびカメラ装置および携帯情報端末装置
US8369030B2 (en) 2009-05-25 2013-02-05 Ricoh Company, Limited Image forming lens, camera device, and handheld terminal
CN105676428B (zh) * 2016-04-12 2017-12-15 广东弘景光电科技股份有限公司 一种超广角光学系统及其应用的镜头

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535323A (en) * 1978-09-04 1980-03-12 Sigma:Kk Super wide-angle zoom lens
JPS5726816A (en) * 1980-07-24 1982-02-13 Minolta Camera Co Ltd Wide angle zoom lens system consisting of three components
US4465343A (en) * 1980-05-10 1984-08-14 Minolta Camera Kabushiki Kaisha Zoom lens system
JPS5891421A (ja) * 1981-11-26 1983-05-31 Canon Inc リヤ−フオ−カス方式のズ−ムレンズ

Also Published As

Publication number Publication date
JPS61170716A (ja) 1986-08-01
US4735493A (en) 1988-04-05

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees