JPH0319526B2 - - Google Patents

Info

Publication number
JPH0319526B2
JPH0319526B2 JP60083548A JP8354885A JPH0319526B2 JP H0319526 B2 JPH0319526 B2 JP H0319526B2 JP 60083548 A JP60083548 A JP 60083548A JP 8354885 A JP8354885 A JP 8354885A JP H0319526 B2 JPH0319526 B2 JP H0319526B2
Authority
JP
Japan
Prior art keywords
lens
lens group
negative
positive
focal length
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
JP60083548A
Other languages
English (en)
Japanese (ja)
Other versions
JPS61240217A (ja
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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP60083548A priority Critical patent/JPS61240217A/ja
Priority to US06/853,243 priority patent/US4726665A/en
Publication of JPS61240217A publication Critical patent/JPS61240217A/ja
Publication of JPH0319526B2 publication Critical patent/JPH0319526B2/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
    • G02B15/143503—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)
JP60083548A 1985-04-17 1985-04-17 コンパクトな広角ズ−ムレンズ Granted JPS61240217A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP60083548A JPS61240217A (ja) 1985-04-17 1985-04-17 コンパクトな広角ズ−ムレンズ
US06/853,243 US4726665A (en) 1985-04-17 1986-04-17 Compact wide-angle zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60083548A JPS61240217A (ja) 1985-04-17 1985-04-17 コンパクトな広角ズ−ムレンズ

Publications (2)

Publication Number Publication Date
JPS61240217A JPS61240217A (ja) 1986-10-25
JPH0319526B2 true JPH0319526B2 (en, 2012) 1991-03-15

Family

ID=13805561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60083548A Granted JPS61240217A (ja) 1985-04-17 1985-04-17 コンパクトな広角ズ−ムレンズ

Country Status (2)

Country Link
US (1) US4726665A (en, 2012)
JP (1) JPS61240217A (en, 2012)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07119872B2 (ja) * 1985-12-02 1995-12-20 旭光学工業株式会社 ズ−ムレンズ鏡筒
JPS63210907A (ja) * 1987-02-27 1988-09-01 Asahi Optical Co Ltd コンパクトで明るい広角ズ−ムレンズ
US4801969A (en) * 1987-10-15 1989-01-31 Eastman Kodak Company Self-coiling exposure shade
GB2244819B (en) * 1990-04-17 1994-08-03 Asahi Optical Co Ltd Zoom lens system
US5283693A (en) * 1990-06-13 1994-02-01 Minolta Camera Kabushiki Kaisha Compact zoom lens system
JPH04289812A (ja) * 1991-03-18 1992-10-14 Asahi Optical Co Ltd ズームレンズ
US5315440A (en) * 1991-11-04 1994-05-24 Eastman Kodak Company Zoom lens having weak front lens group
JPH05249373A (ja) * 1992-03-05 1993-09-28 Nikon Corp 広角ズームレンズ
US5552937A (en) * 1993-04-13 1996-09-03 Matsushita Electric Industrial Co., Ltd. Wide-angel aspheric zoom lens
US5597222A (en) * 1995-01-17 1997-01-28 Ibm Corporation Optical relay lens system for projection displays
US5604637A (en) * 1995-04-17 1997-02-18 Eastman Kodak Company Zoom lens
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
JP4509285B2 (ja) * 2000-03-16 2010-07-21 フジノン株式会社 小型大口径広角ズームレンズ
US9971132B2 (en) 2016-04-25 2018-05-15 Young Optics Inc. Zoom lens

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042451B2 (ja) * 1981-12-07 1985-09-21 マミヤ光機株式会社 広角ズ−ムレンズ
JPS58100115A (ja) * 1981-12-10 1983-06-14 Mamiya Koki Kk ズ−ムレンズ
JPS58111013A (ja) * 1981-12-24 1983-07-01 Canon Inc 小型の広角ズ−ムレンズ
JPS58178316A (ja) * 1982-04-13 1983-10-19 Canon Inc 小型の広角ズ−ムレンズ
JPH0640170B2 (ja) * 1982-07-23 1994-05-25 キヤノン株式会社 高変倍広角ズ−ムレンズ
JPS58200208A (ja) * 1982-05-19 1983-11-21 Canon Inc 小型の広角ズ−ムレンズ
JPS6040605B2 (ja) * 1982-02-01 1985-09-11 マミヤ光機株式会社 広角ズ−ムレンズ
JPS606914A (ja) * 1983-06-25 1985-01-14 Canon Inc ズームレンズ

Also Published As

Publication number Publication date
JPS61240217A (ja) 1986-10-25
US4726665A (en) 1988-02-23

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