JPS5266445A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS5266445A
JPS5266445A JP50142119A JP14211975A JPS5266445A JP S5266445 A JPS5266445 A JP S5266445A JP 50142119 A JP50142119 A JP 50142119A JP 14211975 A JP14211975 A JP 14211975A JP S5266445 A JPS5266445 A JP S5266445A
Authority
JP
Japan
Prior art keywords
zoom lens
alway
maintain
image forming
detecting
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.)
Pending
Application number
JP50142119A
Other languages
English (en)
Inventor
Akira Yamagishi
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP50142119A priority Critical patent/JPS5266445A/ja
Priority to DE19762653929 priority patent/DE2653929B2/de
Priority to DE7637295U priority patent/DE7637295U1/de
Priority to US05/745,606 priority patent/US4073573A/en
Publication of JPS5266445A publication Critical patent/JPS5266445A/ja
Pending 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
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/282—Autofocusing of zoom 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
    • G02B15/142—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 two groups only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Lens Barrels (AREA)
JP50142119A 1975-11-27 1975-11-27 Zoom lens Pending JPS5266445A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP50142119A JPS5266445A (en) 1975-11-27 1975-11-27 Zoom lens
DE19762653929 DE2653929B2 (de) 1975-11-27 1976-11-27 Zoomobjektiv
DE7637295U DE7637295U1 (de) 1975-11-27 1976-11-27 Zoom-objektiv
US05/745,606 US4073573A (en) 1975-11-27 1976-11-29 Zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50142119A JPS5266445A (en) 1975-11-27 1975-11-27 Zoom lens

Publications (1)

Publication Number Publication Date
JPS5266445A true JPS5266445A (en) 1977-06-01

Family

ID=15307836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50142119A Pending JPS5266445A (en) 1975-11-27 1975-11-27 Zoom lens

Country Status (3)

Country Link
US (1) US4073573A (ja)
JP (1) JPS5266445A (ja)
DE (2) DE7637295U1 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162727A (en) * 1980-05-20 1981-12-14 Minolta Camera Co Ltd Focusing device of zoom lens
JPS56165107A (en) * 1980-05-23 1981-12-18 Minolta Camera Co Ltd Focusing device for zoom lens
JPS58143312A (ja) * 1982-02-19 1983-08-25 Minolta Camera Co Ltd ズ−ムレンズ系
JPS58195214U (ja) * 1982-06-23 1983-12-26 ミノルタ株式会社 自動焦点カメラ用ズ−ムレンズ
JPS61259210A (ja) * 1985-05-14 1986-11-17 Canon Inc 倍率切換装置
US5752095A (en) * 1985-05-14 1998-05-12 Canon Kabushiki Kaisha Magnification change-over device for camera

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2925906A1 (de) * 1979-06-27 1981-01-15 Rollei Werke Franke Heidecke Optisches abbildungssystem mit veraenderbarer brennweite, insbesondere zoomobjektiv fuer fotografische kameras
JPS57188004A (en) * 1981-05-14 1982-11-18 Olympus Optical Co Ltd Automatic focusing zoom lens
DE3369738D1 (en) * 1982-05-08 1987-03-12 Angenieux P Ets An improved zoom lens for cameras
JP2538526B2 (ja) * 1986-03-17 1996-09-25 キヤノン株式会社 ズ−ムレンズ
JP3240677B2 (ja) * 1992-02-25 2001-12-17 ソニー株式会社 フォーカス調整装置
JP2004264714A (ja) * 2003-03-04 2004-09-24 Olympus Corp 撮像光学系及び撮像光学系を用いた光学装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB989904A (en) * 1962-09-12 1965-04-22 Evershed Vignoles Ltd Improvements relating to optical systems
JPS5143815Y2 (ja) * 1973-02-09 1976-10-23
GB1484414A (en) * 1974-05-28 1977-09-01 Schneider Co Optische Werke Adjusting device for variable-focus lenses

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162727A (en) * 1980-05-20 1981-12-14 Minolta Camera Co Ltd Focusing device of zoom lens
JPH0119121B2 (ja) * 1980-05-20 1989-04-10 Minolta Camera Kk
JPS56165107A (en) * 1980-05-23 1981-12-18 Minolta Camera Co Ltd Focusing device for zoom lens
JPS6356962B2 (ja) * 1980-05-23 1988-11-09 Minolta Camera Kk
JPS58143312A (ja) * 1982-02-19 1983-08-25 Minolta Camera Co Ltd ズ−ムレンズ系
JPH0477291B2 (ja) * 1982-02-19 1992-12-08 Minolta Camera Kk
JPS58195214U (ja) * 1982-06-23 1983-12-26 ミノルタ株式会社 自動焦点カメラ用ズ−ムレンズ
JPS61259210A (ja) * 1985-05-14 1986-11-17 Canon Inc 倍率切換装置
US5752095A (en) * 1985-05-14 1998-05-12 Canon Kabushiki Kaisha Magnification change-over device for camera
US5774749A (en) * 1985-05-14 1998-06-30 Canon Kabushiki Kaisha Camera having a magnification change-over device
US5819121A (en) * 1985-05-14 1998-10-06 Canon Kabushiki Kaisha Magnification change-over device for camera
US5940632A (en) * 1985-05-14 1999-08-17 Canon Kabushiki Kaisha Magnification change-over device for camera

Also Published As

Publication number Publication date
DE2653929B2 (de) 1978-01-26
DE7637295U1 (de) 1977-07-21
US4073573A (en) 1978-02-14
DE2653929A1 (de) 1977-06-16
DE2653929C3 (ja) 1978-10-12

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