JPS52113753A - Zoom lens capable of simply changing variable focal length range - Google Patents

Zoom lens capable of simply changing variable focal length range

Info

Publication number
JPS52113753A
JPS52113753A JP3049576A JP3049576A JPS52113753A JP S52113753 A JPS52113753 A JP S52113753A JP 3049576 A JP3049576 A JP 3049576A JP 3049576 A JP3049576 A JP 3049576A JP S52113753 A JPS52113753 A JP S52113753A
Authority
JP
Japan
Prior art keywords
focal length
zoom lens
length range
variable focal
simply changing
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.)
Granted
Application number
JP3049576A
Other languages
English (en)
Other versions
JPS617606B2 (ja
Inventor
Kazuo Tanaka
Takamasa Hirose
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP3049576A priority Critical patent/JPS52113753A/ja
Priority to US05/777,852 priority patent/US4157211A/en
Publication of JPS52113753A publication Critical patent/JPS52113753A/ja
Publication of JPS617606B2 publication Critical patent/JPS617606B2/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
    • G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
    • G02B15/10—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment
    • G02B15/12—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by adding a part, e.g. close-up attachment by adding telescopic attachments

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP3049576A 1976-03-19 1976-03-19 Zoom lens capable of simply changing variable focal length range Granted JPS52113753A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3049576A JPS52113753A (en) 1976-03-19 1976-03-19 Zoom lens capable of simply changing variable focal length range
US05/777,852 US4157211A (en) 1976-03-19 1977-03-15 Zoom lens having an easily changeable range of variable focal distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3049576A JPS52113753A (en) 1976-03-19 1976-03-19 Zoom lens capable of simply changing variable focal length range

Publications (2)

Publication Number Publication Date
JPS52113753A true JPS52113753A (en) 1977-09-24
JPS617606B2 JPS617606B2 (ja) 1986-03-07

Family

ID=12305403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3049576A Granted JPS52113753A (en) 1976-03-19 1976-03-19 Zoom lens capable of simply changing variable focal length range

Country Status (2)

Country Link
US (1) US4157211A (ja)
JP (1) JPS52113753A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60208723A (ja) * 1984-04-02 1985-10-21 Canon Inc 大口径高変倍のズ−ムレンズ

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54127322A (en) * 1978-03-27 1979-10-03 Canon Inc Zoom lens
US4318592A (en) * 1978-04-13 1982-03-09 Canon Kabushiki Kaisha Lens system with attachment lens removably attached
JPS5545080A (en) * 1978-09-28 1980-03-29 Canon Inc Zoom lens system which can transfer focal length range
JPS5719709A (en) 1980-07-11 1982-02-02 Nippon Kogaku Kk <Nikon> Zoom lens
JPS5827115A (ja) * 1981-08-12 1983-02-17 Olympus Optical Co Ltd 大口径比望遠レンズ
JPS60176013A (ja) * 1984-02-22 1985-09-10 Olympus Optical Co Ltd 補助レンズ系を備えた変倍レンズ系
US4807982A (en) * 1986-05-10 1989-02-28 Canon Kabushiki Kaisha Lens system of variable magnification range and having a supplementary lens unit
JPH0297707A (ja) * 1988-09-30 1990-04-10 Kinugawa Rubber Ind Co Ltd クリップ
JPH05203873A (ja) * 1992-01-24 1993-08-13 Fuji Photo Optical Co Ltd 射出瞳の遠い２焦点切換式レンズ
JPH06186478A (ja) * 1992-12-17 1994-07-08 Ricoh Co Ltd 超広角を有するズームレンズ
JPH08201697A (ja) * 1994-10-13 1996-08-09 Fuji Photo Optical Co Ltd ズームレンズ
DE69838714T2 (de) * 1997-05-05 2008-10-30 Symbol Technologies, Inc. Optische abtastvorrichtung und bildleser zum bildlesen und dekodieren optischer informationen mit ein- und zweidimensionalen symbolen bei veränderlicher tiefenschärfe
JP4838557B2 (ja) * 2005-09-12 2011-12-14 キヤノン株式会社 ズームレンズ及びそれを有する撮像装置
CN104054013B (zh) * 2012-09-14 2016-08-24 奥林巴斯株式会社 内窥镜物镜
JP6643024B2 (ja) 2015-09-30 2020-02-12 キヤノン株式会社 エクステンダレンズ群、ズームレンズおよび撮像装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015895A (en) * 1973-01-18 1977-04-05 Canon Kabushiki Kaisha Zoom lens system having enlarged range of variation in magnification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60208723A (ja) * 1984-04-02 1985-10-21 Canon Inc 大口径高変倍のズ−ムレンズ

Also Published As

Publication number Publication date
JPS617606B2 (ja) 1986-03-07
US4157211A (en) 1979-06-05

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