JP4469625B2 - ズームレンズ - Google Patents
ズームレンズ Download PDFInfo
- Publication number
- JP4469625B2 JP4469625B2 JP2004035334A JP2004035334A JP4469625B2 JP 4469625 B2 JP4469625 B2 JP 4469625B2 JP 2004035334 A JP2004035334 A JP 2004035334A JP 2004035334 A JP2004035334 A JP 2004035334A JP 4469625 B2 JP4469625 B2 JP 4469625B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- group
- positive
- zoom lens
- zoom
- 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
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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
- G02B15/144109—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 +--+
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Description
0.4<(RfG121−RrG122)/(RfG121+RrG122)<4.5 ……(1)
1.0<FG121,G122/FG12<4.4 ……(2)
4.0<FG12/FG1<7.0 ……(3)
0.4<(RfG121−RrG122)/(RfG121+RrG122)<4.5 ……(1)
1.0<FG121,G122/FG12<4.4 ……(2)
4.0<FG12/FG1<7.0 ……(3)
0.4<(RfG121−RrG122)/(RfG121+RrG122)<2.0 ……(1−1)
上記した特許文献1,2に記載のズームレンズでは、合焦用の第1の正レンズ群G12において正レンズが先行配置された構成となっているため、上記した効果に関して不利となる。
Claims (3)
- 物体側から順に、正の屈折力を有する第1群と、負の屈折力を有する第2群と、正または負の屈折力を有する第3群と、正の屈折力を有する第4群とからなり、
前記第2群と前記第3群とを光軸上で移動させることにより変倍を行うと共に、前記第1群の一部を光軸上で移動させることにより合焦を行うようになされ、
前記第1群は、物体側から順に、合焦時に固定の負レンズ群G11と、合焦時に光軸上を移動する第1の正レンズ群G12と、合焦時に固定の第2の正レンズ群G13とからなり、
前記第1の正レンズ群G12が、物体側から順に、負レンズG121と、第1の正レンズG122と、第2の正レンズG123との3枚で構成され、
かつ、以下の条件式(2)を満足するように構成されている
ことを特徴とするズームレンズ。
1.0<F G121,G122 /F G12 <4.4 ……(2)
ただし、
F G12 :第1の正レンズ群G12全体の焦点距離
F G121,G122 :第1の正レンズ群G12における負レンズG121と第1の正レンズG122との合成焦点距離 - さらに、以下の条件式(1)を満足するように構成されている
ことを特徴とする請求項1に記載のズームレンズ。
0.4<(RfG121−RrG122)/(RfG121+RrG122)<4.5 ……(1)
ただし、
RfG121:第1の正レンズ群G12の負レンズG121における物体側の面の曲率半径
RrG122:第1の正レンズ群G12の第1の正レンズG122における像側の面の曲率半径 - さらに、以下の条件式(3)を満足するように構成されている
ことを特徴とする請求項1または2に記載のズームレンズ。
4.0<FG12/FG1<7.0 ……(3)
ただし、
FG1:第1群全体の焦点距離
FG12:第1の正レンズ群G12全体の焦点距離
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004035334A JP4469625B2 (ja) | 2004-02-12 | 2004-02-12 | ズームレンズ |
US11/045,349 US7085069B2 (en) | 2004-02-12 | 2005-01-31 | Large zoom ratio zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004035334A JP4469625B2 (ja) | 2004-02-12 | 2004-02-12 | ズームレンズ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005227494A JP2005227494A (ja) | 2005-08-25 |
JP4469625B2 true JP4469625B2 (ja) | 2010-05-26 |
Family
ID=34836209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004035334A Expired - Fee Related JP4469625B2 (ja) | 2004-02-12 | 2004-02-12 | ズームレンズ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7085069B2 (ja) |
JP (1) | JP4469625B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3151050A1 (en) | 2015-09-30 | 2017-04-05 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4751732B2 (ja) * | 2006-02-10 | 2011-08-17 | Hoya株式会社 | 望遠ズームレンズ系 |
WO2009034712A1 (ja) * | 2007-09-12 | 2009-03-19 | Panasonic Corporation | ズームレンズ系、撮像装置及びカメラ |
US8064144B2 (en) | 2007-09-12 | 2011-11-22 | Panasonic Corporation | Zoom lens system, imaging device and camera |
JP5441377B2 (ja) * | 2008-08-07 | 2014-03-12 | キヤノン株式会社 | 単焦点光学系及びそれを有する撮像装置 |
JP5325021B2 (ja) * | 2009-05-20 | 2013-10-23 | Hoya株式会社 | ズームレンズ系 |
JP5438620B2 (ja) * | 2010-07-29 | 2014-03-12 | 富士フイルム株式会社 | ズームレンズおよび撮像装置 |
CN103797397B (zh) * | 2011-09-16 | 2016-03-30 | 富士胶片株式会社 | 变焦镜头和成像设备 |
KR101890304B1 (ko) | 2011-11-04 | 2018-08-22 | 삼성전자주식회사 | 줌렌즈 및 이를 구비한 촬영 장치 |
JP6236779B2 (ja) | 2012-03-02 | 2017-11-29 | 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 |
JP6034656B2 (ja) | 2012-10-26 | 2016-11-30 | 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 |
JP2019078849A (ja) * | 2017-10-23 | 2019-05-23 | 富士フイルム株式会社 | ズームレンズ及び撮像装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1062686A (ja) * | 1996-08-19 | 1998-03-06 | Fuji Photo Optical Co Ltd | インナーフォーカシングタイプのズームレンズ |
JP2000267003A (ja) * | 1999-03-12 | 2000-09-29 | Fuji Photo Optical Co Ltd | ズームレンズ |
US6545818B2 (en) * | 1999-05-10 | 2003-04-08 | Canon Kabushiki Kaisha | Zoom lens and camera system |
JP4463909B2 (ja) | 1999-10-19 | 2010-05-19 | キヤノン株式会社 | ズームレンズ |
-
2004
- 2004-02-12 JP JP2004035334A patent/JP4469625B2/ja not_active Expired - Fee Related
-
2005
- 2005-01-31 US US11/045,349 patent/US7085069B2/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3151050A1 (en) | 2015-09-30 | 2017-04-05 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
US10598909B2 (en) | 2015-09-30 | 2020-03-24 | Canon Kabushiki Kaisha | Zoom lens and image pickup apparatus including the same |
Also Published As
Publication number | Publication date |
---|---|
JP2005227494A (ja) | 2005-08-25 |
US20050180024A1 (en) | 2005-08-18 |
US7085069B2 (en) | 2006-08-01 |
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