JPS55117119A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS55117119A
JPS55117119A JP2489979A JP2489979A JPS55117119A JP S55117119 A JPS55117119 A JP S55117119A JP 2489979 A JP2489979 A JP 2489979A JP 2489979 A JP2489979 A JP 2489979A JP S55117119 A JPS55117119 A JP S55117119A
Authority
JP
Japan
Prior art keywords
lens group
lens
aberration
convergent
divergent
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
JP2489979A
Other languages
Japanese (ja)
Other versions
JPS6144286B2 (en
Inventor
Kazuo Tanaka
Takamasa Hirose
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 JP2489979A priority Critical patent/JPS55117119A/en
Publication of JPS55117119A publication Critical patent/JPS55117119A/en
Publication of JPS6144286B2 publication Critical patent/JPS6144286B2/ja
Granted legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To achieve the improvement in aberration correction by eliminating the aberrations produced along with the focusing action of the focusing lens group provided to the front lens part through movement of the aberration-correcting lens provided to the front lens part.
CONSTITUTION: The zoom lens consists of the front lens part I, zoom part II and relay part III. The front lens part I is the refractive power disposition of the divergent 1st lens group, convergent 2nd lens group, divergent 3rd lens group and convergent 4th lens group from the object side and the 2nd lens group is so constituted that the magnification of its imaging, i.e., its lateral magnification absolute value becomes larger than 1. Here, at the time when the subject distance is forcussed from a remote to a near distance, the 2nd lens group moves to the image plane side. Along with this, the 3rd lens group moves in the same direction as the 2nd lens group and this makes it possible to well correct aberration degradation, particularly spherical aberrations in the near distance on the long focus side.
COPYRIGHT: (C)1980,JPO&Japio
JP2489979A 1979-03-02 1979-03-02 Zoom lens Granted JPS55117119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2489979A JPS55117119A (en) 1979-03-02 1979-03-02 Zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2489979A JPS55117119A (en) 1979-03-02 1979-03-02 Zoom lens

Publications (2)

Publication Number Publication Date
JPS55117119A true JPS55117119A (en) 1980-09-09
JPS6144286B2 JPS6144286B2 (en) 1986-10-02

Family

ID=12151020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2489979A Granted JPS55117119A (en) 1979-03-02 1979-03-02 Zoom lens

Country Status (1)

Country Link
JP (1) JPS55117119A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5737128A (en) * 1995-06-22 1998-04-07 Canon Kabushiki Kaisha Zoom lens device with inner focusing method
US5757554A (en) * 1995-06-29 1998-05-26 Canon Kabushiki Kaisha Zoom lens
US5760967A (en) * 1993-11-30 1998-06-02 Canon Kabushiki Kaisha Zoom lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5760967A (en) * 1993-11-30 1998-06-02 Canon Kabushiki Kaisha Zoom lens
US5737128A (en) * 1995-06-22 1998-04-07 Canon Kabushiki Kaisha Zoom lens device with inner focusing method
US5757554A (en) * 1995-06-29 1998-05-26 Canon Kabushiki Kaisha Zoom lens

Also Published As

Publication number Publication date
JPS6144286B2 (en) 1986-10-02

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