JPS55117119A - Zoom lens - Google Patents
Zoom lensInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1979
- 1979-03-02 JP JP2489979A patent/JPS55117119A/en active Granted
Cited By (3)
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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