JP3947340B2 - ズームレンズのフォーカシング方法 - Google Patents

ズームレンズのフォーカシング方法 Download PDF

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Publication number
JP3947340B2
JP3947340B2 JP2000097601A JP2000097601A JP3947340B2 JP 3947340 B2 JP3947340 B2 JP 3947340B2 JP 2000097601 A JP2000097601 A JP 2000097601A JP 2000097601 A JP2000097601 A JP 2000097601A JP 3947340 B2 JP3947340 B2 JP 3947340B2
Authority
JP
Japan
Prior art keywords
lens group
focal length
lens
focus
magnification
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 - Fee Related
Application number
JP2000097601A
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English (en)
Japanese (ja)
Other versions
JP2001281522A (ja
JP2001281522A5 (enExample
Inventor
勝 江口
孝之 伊藤
Original Assignee
ペンタックス株式会社
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 ペンタックス株式会社 filed Critical ペンタックス株式会社
Priority to JP2000097601A priority Critical patent/JP3947340B2/ja
Priority to US09/818,504 priority patent/US6807015B2/en
Publication of JP2001281522A publication Critical patent/JP2001281522A/ja
Publication of JP2001281522A5 publication Critical patent/JP2001281522A5/ja
Application granted granted Critical
Publication of JP3947340B2 publication Critical patent/JP3947340B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B15/142—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
    • 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
    • G02B15/1425—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 the first group being negative
    • 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)
  • Focusing (AREA)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)
JP2000097601A 2000-03-31 2000-03-31 ズームレンズのフォーカシング方法 Expired - Fee Related JP3947340B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000097601A JP3947340B2 (ja) 2000-03-31 2000-03-31 ズームレンズのフォーカシング方法
US09/818,504 US6807015B2 (en) 2000-03-31 2001-03-28 Focusing method for a zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000097601A JP3947340B2 (ja) 2000-03-31 2000-03-31 ズームレンズのフォーカシング方法

Publications (3)

Publication Number Publication Date
JP2001281522A JP2001281522A (ja) 2001-10-10
JP2001281522A5 JP2001281522A5 (enExample) 2005-06-16
JP3947340B2 true JP3947340B2 (ja) 2007-07-18

Family

ID=18612198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000097601A Expired - Fee Related JP3947340B2 (ja) 2000-03-31 2000-03-31 ズームレンズのフォーカシング方法

Country Status (2)

Country Link
US (1) US6807015B2 (enExample)
JP (1) JP3947340B2 (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4351525B2 (ja) 2003-08-22 2009-10-28 富士フイルム株式会社 ズームレンズおよび撮影装置
JP5051812B2 (ja) * 2004-01-14 2012-10-17 株式会社リコー 撮像装置、その合焦方法および記録媒体
TWI401471B (zh) * 2009-09-24 2013-07-11 Silicon Touch Tech Inc 液晶光學透鏡及其製作方法、應用液晶光學透鏡的鏡頭裝置
JP5577309B2 (ja) * 2010-09-17 2014-08-20 パナソニック株式会社 ズームレンズ系、レンズ鏡筒、交換レンズ装置及びカメラシステム
JP2012098706A (ja) 2010-10-06 2012-05-24 Nikon Corp カメラシステムおよび交換レンズ
JP2014137540A (ja) * 2013-01-18 2014-07-28 Sony Corp 撮像レンズ及び撮像装置
JP5613277B2 (ja) 2013-03-05 2014-10-22 オリンパスイメージング株式会社 ズームレンズ及びそれを備えた撮像装置
JP7279408B2 (ja) * 2019-02-26 2023-05-23 株式会社ニコン 交換レンズ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0690361B2 (ja) * 1984-10-18 1994-11-14 オリンパス光学工業株式会社 ズ−ムレンズ
KR0149575B1 (ko) * 1986-05-12 1998-10-01 마쓰모도 도오루 렌즈셔터식 줌렌즈 카메라
US5042926A (en) * 1989-01-23 1991-08-27 Ricoh Company, Ltd. Zoom lens and focusing method
FR2658926A1 (en) * 1990-02-14 1991-08-30 Asahi Optical Co Ltd Photographic apparatus with a zoom lens including a macro view taking function
JPH09269448A (ja) * 1996-04-01 1997-10-14 Asahi Optical Co Ltd ズームレンズカメラのマクロ方式

Also Published As

Publication number Publication date
JP2001281522A (ja) 2001-10-10
US20010043405A1 (en) 2001-11-22
US6807015B2 (en) 2004-10-19

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