DE3802725C2 - - Google Patents

Info

Publication number
DE3802725C2
DE3802725C2 DE3802725A DE3802725A DE3802725C2 DE 3802725 C2 DE3802725 C2 DE 3802725C2 DE 3802725 A DE3802725 A DE 3802725A DE 3802725 A DE3802725 A DE 3802725A DE 3802725 C2 DE3802725 C2 DE 3802725C2
Authority
DE
Germany
Prior art keywords
lens
subgroup
refractive power
focal length
lens group
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 - Lifetime
Application number
DE3802725A
Other languages
German (de)
English (en)
Other versions
DE3802725A1 (de
Inventor
Koichi Tokio/Tokyo Jp Maruyama
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
Publication of DE3802725A1 publication Critical patent/DE3802725A1/de
Application granted granted Critical
Publication of DE3802725C2 publication Critical patent/DE3802725C2/de
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 +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
DE3802725A 1987-01-30 1988-01-29 Tele-zoom-linsensystem Granted DE3802725A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62020204A JPS63188110A (ja) 1987-01-30 1987-01-30 望遠ズ−ムレンズ

Publications (2)

Publication Number Publication Date
DE3802725A1 DE3802725A1 (de) 1988-08-11
DE3802725C2 true DE3802725C2 (en, 2012) 1992-03-26

Family

ID=12020635

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3802725A Granted DE3802725A1 (de) 1987-01-30 1988-01-29 Tele-zoom-linsensystem

Country Status (3)

Country Link
US (1) US4848883A (en, 2012)
JP (1) JPS63188110A (en, 2012)
DE (1) DE3802725A1 (en, 2012)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000550A (en) * 1989-01-30 1991-03-19 Canon Kabushiki Kaisha Wide-angle type zoom lens having inner-focus lens
JPH02244110A (ja) * 1989-03-17 1990-09-28 Canon Inc ズームレンズ
US5033832A (en) * 1989-04-28 1991-07-23 Asahi Kogaku Kogyo K.K. High zoom-ratio lens system for covering wide angle for compact camera
JPH02293706A (ja) * 1989-05-08 1990-12-04 Asahi Optical Co Ltd レンズの組み付け構造
JPH0331809A (ja) * 1989-06-29 1991-02-12 Olympus Optical Co Ltd ズームレンズ
US5327290A (en) * 1989-10-13 1994-07-05 Minolta Camera Kabushiki Kaisha Compact size zoom lens system
JP2808815B2 (ja) * 1990-04-19 1998-10-08 株式会社ニコン 内部合焦式望遠ズームレンズ
JPH05303035A (ja) * 1992-04-27 1993-11-16 Nikon Corp 内焦超望遠ズームレンズ
JP3266653B2 (ja) * 1992-07-13 2002-03-18 旭光学工業株式会社 望遠ズームレンズ
JP3237275B2 (ja) * 1993-02-08 2001-12-10 キヤノン株式会社 ズームレンズ
US5745300A (en) * 1993-02-17 1998-04-28 Canon Kabushiki Kaisha Zoom lens of the inner focus type
US5371626A (en) * 1993-03-09 1994-12-06 Benopcon, Inc. Wide angle binocular system with variable power capability
JPH07199066A (ja) * 1993-12-28 1995-08-04 Nikon Corp 大口径中望遠レンズ
US5633760A (en) * 1994-02-03 1997-05-27 Nikon Corporation Zoom lens
US6101045A (en) * 1994-02-14 2000-08-08 Minolta Co., Ltd. Zoom lens system
JP3376171B2 (ja) * 1995-06-22 2003-02-10 キヤノン株式会社 ズームレンズ
JP3827251B2 (ja) * 1996-07-16 2006-09-27 フジノン株式会社 ズームレンズ
US6061180A (en) * 1996-10-29 2000-05-09 Canon Kabushiki Kaisha Zoom lens
US6115188A (en) * 1997-10-16 2000-09-05 Canon Kabushiki Kaisha Optical system and optical apparatus having the same
US6493142B1 (en) * 1999-07-30 2002-12-10 Canon Kabushiki Kaisha Zoom lens and photographing apparatus having it
JP4659196B2 (ja) * 1999-10-14 2011-03-30 キヤノン株式会社 ズームレンズ及び撮影装置
JP4630423B2 (ja) * 2000-06-16 2011-02-09 キヤノン株式会社 ズームレンズ及びそれを用いた光学機器
JP4653284B2 (ja) * 2000-06-21 2011-03-16 株式会社シグマ 大口径比望遠ズームレンズ
JP2003329928A (ja) * 2002-05-09 2003-11-19 Pentax Corp ズームレンズ系
JP4857576B2 (ja) * 2005-03-23 2012-01-18 株式会社ニコン ズームレンズ
JP4869827B2 (ja) 2006-08-10 2012-02-08 富士フイルム株式会社 ズームレンズおよび撮像装置
JP2010197460A (ja) * 2009-02-23 2010-09-09 Topcon Corp 熱収差の除去された長焦点レンズ
JP5208185B2 (ja) * 2010-11-16 2013-06-12 キヤノン株式会社 ズームレンズおよび光学機器
JP5664363B2 (ja) 2011-03-10 2015-02-04 リコーイメージング株式会社 ズームレンズ系及びこれを備えた電子撮像装置
JP5693321B2 (ja) * 2011-03-28 2015-04-01 キヤノン株式会社 ズームレンズ及び撮像装置
JP5693322B2 (ja) * 2011-03-28 2015-04-01 キヤノン株式会社 ズームレンズ及び撮像装置
JP5754634B2 (ja) * 2011-07-22 2015-07-29 株式会社ニコン 光学系、及び、この光学系を有する光学機器
JP2013025159A (ja) * 2011-07-22 2013-02-04 Nikon Corp 光学系、この光学系を有する光学機器、及び、光学系の製造方法
JP5754633B2 (ja) * 2011-07-22 2015-07-29 株式会社ニコン 光学系、及び、この光学系を有する光学機器
US9739986B2 (en) 2014-06-13 2017-08-22 Canon Kabushiki Kaisha Zoom lens and image pickup apparatus including the same
JP5984877B2 (ja) * 2014-06-13 2016-09-06 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
JP6646244B2 (ja) * 2015-03-18 2020-02-14 キヤノン株式会社 ズームレンズおよび撮像装置
JP6544975B2 (ja) * 2015-04-10 2019-07-17 キヤノン株式会社 ズームレンズおよび撮像装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594688B2 (ja) * 1976-03-11 1984-01-31 キヤノン株式会社 ズ−ムレンズ
JPS5915214A (ja) * 1982-07-17 1984-01-26 Canon Inc ズ−ムレンズのフオ−カシング方法
JPH05114593A (ja) * 1991-10-23 1993-05-07 Fujitsu Ltd 半導体ウエハーの研削方法

Also Published As

Publication number Publication date
DE3802725A1 (de) 1988-08-11
JPH041328B2 (en, 2012) 1992-01-10
JPS63188110A (ja) 1988-08-03
US4848883A (en) 1989-07-18

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PENTAX CORP., TOKIO/TOKYO, JP

8339 Ceased/non-payment of the annual fee