JPS6248809B2 - - Google Patents

Info

Publication number
JPS6248809B2
JPS6248809B2 JP56077935A JP7793581A JPS6248809B2 JP S6248809 B2 JPS6248809 B2 JP S6248809B2 JP 56077935 A JP56077935 A JP 56077935A JP 7793581 A JP7793581 A JP 7793581A JP S6248809 B2 JPS6248809 B2 JP S6248809B2
Authority
JP
Japan
Prior art keywords
lens
lens component
focal length
positive
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
Application number
JP56077935A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57192918A (en
Inventor
Hisao Fujita
Shozo Ishama
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56077935A priority Critical patent/JPS57192918A/ja
Priority to US06/381,311 priority patent/US4501475A/en
Publication of JPS57192918A publication Critical patent/JPS57192918A/ja
Publication of JPS6248809B2 publication Critical patent/JPS6248809B2/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
    • G02B15/144—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 four groups only
    • G02B15/1441—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 four groups only the first group being positive
    • G02B15/144113—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 four groups only the first group being positive arranged +-++
    • 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
    • G02B15/145—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 five groups only
    • G02B15/1451—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 five groups only the first group being positive
    • G02B15/145129—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 five groups only the first group being positive arranged +-+++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP56077935A 1981-05-25 1981-05-25 Compact zoom lens Granted JPS57192918A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56077935A JPS57192918A (en) 1981-05-25 1981-05-25 Compact zoom lens
US06/381,311 US4501475A (en) 1981-05-25 1982-05-24 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077935A JPS57192918A (en) 1981-05-25 1981-05-25 Compact zoom lens

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP61117574A Division JPS61258220A (ja) 1986-05-23 1986-05-23 コンパクトズームレンズ

Publications (2)

Publication Number Publication Date
JPS57192918A JPS57192918A (en) 1982-11-27
JPS6248809B2 true JPS6248809B2 (en, 2012) 1987-10-15

Family

ID=13647930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077935A Granted JPS57192918A (en) 1981-05-25 1981-05-25 Compact zoom lens

Country Status (1)

Country Link
JP (1) JPS57192918A (en, 2012)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57195213A (en) * 1981-05-26 1982-11-30 Konishiroku Photo Ind Co Ltd Compact zoom lens
JPS58224323A (ja) * 1982-06-23 1983-12-26 Asahi Optical Co Ltd ズ−ムレンズ
JPS61258220A (ja) * 1986-05-23 1986-11-15 Konishiroku Photo Ind Co Ltd コンパクトズームレンズ
JP2581191B2 (ja) * 1988-08-31 1997-02-12 キヤノン株式会社 ズームレンズ
JP3104227B2 (ja) * 1989-08-18 2000-10-30 株式会社ニコン ズームレンズ
JP2623835B2 (ja) * 1989-06-09 1997-06-25 キヤノン株式会社 リヤーフォーカス式のズームレンズ
JP2623836B2 (ja) * 1989-06-09 1997-06-25 キヤノン株式会社 リヤーフォーカス式のズームレンズ
JP3387687B2 (ja) * 1995-03-13 2003-03-17 キヤノン株式会社 ズームレンズ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832684B2 (ja) * 1977-07-30 1983-07-14 旭光学工業株式会社 高変倍率を有する広角ズ−ムレンズ系
JPS5515102A (en) * 1978-07-17 1980-02-02 Sigma:Kk High power telescopic zoom lens

Also Published As

Publication number Publication date
JPS57192918A (en) 1982-11-27

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