JPS5564204A - Zoom lens barrel capable of making fixed magnification image pickup - Google Patents
Zoom lens barrel capable of making fixed magnification image pickupInfo
- Publication number
- JPS5564204A JPS5564204A JP13763178A JP13763178A JPS5564204A JP S5564204 A JPS5564204 A JP S5564204A JP 13763178 A JP13763178 A JP 13763178A JP 13763178 A JP13763178 A JP 13763178A JP S5564204 A JPS5564204 A JP S5564204A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- relations
- lens barrel
- image pickup
- logarithmic scale
- 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.)
- Pending
Links
Landscapes
- Focusing (AREA)
- Lens Barrels (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE: To make possible the fixed magnification image pickup with the construction intrinsic to the lens barrel by incorporating the linear functions of the same gradient for the respective relations between the rotating angles of a focusing ring and the logarithmic scale of object distances as well as between the rotating angle of a zooming ring and the logarithmic scale of focal lengths.
CONSTITUTION: In ordinary photographing, a focusing ring 9 and zooming ring 14 are made separate in system. On the other hand, in performing fixed mangification photographing, an engaging piece 19 is moved to the engaging position and is engaged with any of the notches 22 thru 25 corresponding to magnifications. As a result, the focousing ring 9 and zooming ring 14 become integrally rotatable by maintaining a fixed relative position relation. At this time the relations between the rotating angles of the focusing ring 9 and the logarithmic scale of object distances as well as the relations between the rotating angles of the zooming ring 14 and the logarithmic scale of focal lengths are of the linear relations of the same gradient and therefore the image magnification is maintained constant even if the object distance changes. In this way, fixed magnification image pickup by using the construction intrinsic to the lens barrel is made possible.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13763178A JPS5564204A (en) | 1978-11-07 | 1978-11-07 | Zoom lens barrel capable of making fixed magnification image pickup |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13763178A JPS5564204A (en) | 1978-11-07 | 1978-11-07 | Zoom lens barrel capable of making fixed magnification image pickup |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5564204A true JPS5564204A (en) | 1980-05-14 |
Family
ID=15203158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13763178A Pending JPS5564204A (en) | 1978-11-07 | 1978-11-07 | Zoom lens barrel capable of making fixed magnification image pickup |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564204A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60118109U (en) * | 1984-01-14 | 1985-08-09 | 旭光学工業株式会社 | Close-up lens magnification presetting device |
JPS62276520A (en) * | 1986-05-23 | 1987-12-01 | Chinon Kk | Zoom lens focusing device |
US4951075A (en) * | 1988-01-08 | 1990-08-21 | Minolta Camera Kabushiki Kaisha | Zoom camera |
US5122825A (en) * | 1987-08-12 | 1992-06-16 | Minolta Camera Kabushiki Kaisha | Zoom camera |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5413328A (en) * | 1977-06-30 | 1979-01-31 | Fuji Photo Film Co Ltd | Film unit feeder of self-treating type camera |
-
1978
- 1978-11-07 JP JP13763178A patent/JPS5564204A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5413328A (en) * | 1977-06-30 | 1979-01-31 | Fuji Photo Film Co Ltd | Film unit feeder of self-treating type camera |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60118109U (en) * | 1984-01-14 | 1985-08-09 | 旭光学工業株式会社 | Close-up lens magnification presetting device |
JPH043285Y2 (en) * | 1984-01-14 | 1992-02-03 | ||
JPS62276520A (en) * | 1986-05-23 | 1987-12-01 | Chinon Kk | Zoom lens focusing device |
US5122825A (en) * | 1987-08-12 | 1992-06-16 | Minolta Camera Kabushiki Kaisha | Zoom camera |
US4951075A (en) * | 1988-01-08 | 1990-08-21 | Minolta Camera Kabushiki Kaisha | Zoom camera |
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