JPS6229768B2 - - Google Patents

Info

Publication number
JPS6229768B2
JPS6229768B2 JP56021183A JP2118381A JPS6229768B2 JP S6229768 B2 JPS6229768 B2 JP S6229768B2 JP 56021183 A JP56021183 A JP 56021183A JP 2118381 A JP2118381 A JP 2118381A JP S6229768 B2 JPS6229768 B2 JP S6229768B2
Authority
JP
Japan
Prior art keywords
group
lens
positive
negative
lenses
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
JP56021183A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57135912A (en
Inventor
Sadao Okudaira
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 JP56021183A priority Critical patent/JPS57135912A/ja
Priority to GB8203742A priority patent/GB2093212B/en
Priority to US06/349,345 priority patent/US4491395A/en
Priority to DE3205471A priority patent/DE3205471C2/de
Publication of JPS57135912A publication Critical patent/JPS57135912A/ja
Publication of JPS6229768B2 publication Critical patent/JPS6229768B2/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
    • 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
    • G02B15/144109—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 +--+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP56021183A 1981-02-16 1981-02-16 Zoom lens Granted JPS57135912A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56021183A JPS57135912A (en) 1981-02-16 1981-02-16 Zoom lens
GB8203742A GB2093212B (en) 1981-02-16 1982-02-09 Zoom lens system having four groups
US06/349,345 US4491395A (en) 1981-02-16 1982-02-16 Zoom lens system
DE3205471A DE3205471C2 (de) 1981-02-16 1982-02-16 Varioobjektiv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56021183A JPS57135912A (en) 1981-02-16 1981-02-16 Zoom lens

Publications (2)

Publication Number Publication Date
JPS57135912A JPS57135912A (en) 1982-08-21
JPS6229768B2 true JPS6229768B2 (en, 2012) 1987-06-29

Family

ID=12047820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56021183A Granted JPS57135912A (en) 1981-02-16 1981-02-16 Zoom lens

Country Status (4)

Country Link
US (1) US4491395A (en, 2012)
JP (1) JPS57135912A (en, 2012)
DE (1) DE3205471C2 (en, 2012)
GB (1) GB2093212B (en, 2012)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58102208A (ja) * 1981-12-14 1983-06-17 Konishiroku Photo Ind Co Ltd コンパクト・ズ−ムレンズ
JPS63285510A (ja) * 1987-05-18 1988-11-22 Canon Inc ズ−ムレンズ
JP3088112B2 (ja) * 1990-10-12 2000-09-18 旭光学工業株式会社 ズームレンズ
JP3412964B2 (ja) 1995-05-10 2003-06-03 キヤノン株式会社 防振機能を有した光学系
JP3538265B2 (ja) * 1995-08-25 2004-06-14 ペンタックス株式会社 高変倍ズームレンズ系
JP3360779B2 (ja) * 1995-08-25 2002-12-24 ペンタックス株式会社 高変倍ズームレンズ系
JP3340609B2 (ja) * 1996-01-29 2002-11-05 旭光学工業株式会社 ズームレンズ系
JPH1054938A (ja) * 1996-08-12 1998-02-24 Asahi Optical Co Ltd 大口径非球面ズームレンズ系
JP3723643B2 (ja) * 1996-08-12 2005-12-07 ペンタックス株式会社 高変倍ズームレンズ系
JP3824190B2 (ja) * 1997-11-05 2006-09-20 フジノン株式会社 広角ズームレンズ

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5652291B2 (en, 2012) * 1973-02-13 1981-12-11
JPS5040144A (en, 2012) * 1973-08-17 1975-04-12
AT340168B (de) * 1974-11-18 1977-11-25 Eumig Grundobjektiv
AT337473B (de) * 1974-11-18 1977-07-11 Eumig Afokaler vorsatz
CH612767A5 (en) * 1975-08-06 1979-08-15 Bolex Int Sa Optical system having a lens and an attachment element
JPS5832686B2 (ja) * 1976-04-20 1983-07-14 オリンパス光学工業株式会社 高変倍ズ−ムレンズ
JPS54137329A (en) * 1978-04-17 1979-10-25 Canon Inc Lens device having shiftable focal length
DE2830202A1 (de) * 1978-07-10 1980-01-24 Schneider Co Optische Werke Objektiv mit veraenderbarer brennweite
JPS5833533B2 (ja) * 1978-09-28 1983-07-20 チノン株式会社 ズ−ムレンズ
JPS5595922A (en) * 1979-01-12 1980-07-21 Chinon Kk Zoom lens

Also Published As

Publication number Publication date
DE3205471C2 (de) 1984-03-08
GB2093212A (en) 1982-08-25
GB2093212B (en) 1985-03-13
JPS57135912A (en) 1982-08-21
DE3205471A1 (de) 1982-09-09
US4491395A (en) 1985-01-01

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