JPS5423556A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS5423556A
JPS5423556A JP8803877A JP8803877A JPS5423556A JP S5423556 A JPS5423556 A JP S5423556A JP 8803877 A JP8803877 A JP 8803877A JP 8803877 A JP8803877 A JP 8803877A JP S5423556 A JPS5423556 A JP S5423556A
Authority
JP
Japan
Prior art keywords
group
movable
zoom lens
improvement
performance
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
JP8803877A
Other languages
English (en)
Other versions
JPS6139649B2 (ja
Inventor
Sadahiko Tsuji
Yasuhisa Sato
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 JP8803877A priority Critical patent/JPS5423556A/ja
Priority to US05/925,299 priority patent/US4240698A/en
Priority to DE2831996A priority patent/DE2831996C2/de
Publication of JPS5423556A publication Critical patent/JPS5423556A/ja
Publication of JPS6139649B2 publication Critical patent/JPS6139649B2/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
    • G02B15/145—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP8803877A 1977-07-22 1977-07-22 Zoom lens Granted JPS5423556A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8803877A JPS5423556A (en) 1977-07-22 1977-07-22 Zoom lens
US05/925,299 US4240698A (en) 1977-07-22 1978-07-17 Large aperture zoom lens
DE2831996A DE2831996C2 (de) 1977-07-22 1978-07-20 Varioobjektiv mit großer relativer Öffnung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8803877A JPS5423556A (en) 1977-07-22 1977-07-22 Zoom lens

Publications (2)

Publication Number Publication Date
JPS5423556A true JPS5423556A (en) 1979-02-22
JPS6139649B2 JPS6139649B2 (ja) 1986-09-04

Family

ID=13931643

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8803877A Granted JPS5423556A (en) 1977-07-22 1977-07-22 Zoom lens

Country Status (3)

Country Link
US (1) US4240698A (ja)
JP (1) JPS5423556A (ja)
DE (1) DE2831996C2 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050972A (en) * 1989-02-08 1991-09-24 Canon Kabushiki Kaisha Zoom lens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201700A1 (de) * 1981-01-22 1982-08-26 Canon K.K., Tokyo "varioobjektiv"
CN114355589B (zh) * 2021-12-29 2023-07-28 福建福光股份有限公司 一种31倍小型化连续变焦距镜头

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4928383A (ja) * 1972-07-05 1974-03-13
JPS4942361A (ja) * 1972-08-29 1974-04-20
JPS49107248A (ja) * 1973-02-13 1974-10-11

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512872A (en) * 1968-07-16 1970-05-19 Wollensak Inc Variable magnification lens system
US3997244A (en) * 1972-12-27 1976-12-14 Canon Kabushiki Kaisha Zoom lens having well-compensated distortion
DE2350829A1 (de) * 1973-10-10 1975-04-24 Schneider Co Optische Werke Lichtstarkes vario-objektiv
AT336919B (de) * 1975-08-11 1977-06-10 Eumig Pankratisches objektiv

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4928383A (ja) * 1972-07-05 1974-03-13
JPS4942361A (ja) * 1972-08-29 1974-04-20
JPS49107248A (ja) * 1973-02-13 1974-10-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050972A (en) * 1989-02-08 1991-09-24 Canon Kabushiki Kaisha Zoom lens

Also Published As

Publication number Publication date
US4240698A (en) 1980-12-23
DE2831996A1 (de) 1979-02-01
JPS6139649B2 (ja) 1986-09-04
DE2831996C2 (de) 1982-04-08

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