JPS5564204A - Zoom lens barrel capable of making fixed magnification image pickup - Google Patents

Zoom lens barrel capable of making fixed magnification image pickup

Info

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
Application number
JP13763178A
Other languages
Japanese (ja)
Inventor
Kyozo Uesugi
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.)
Minolta Co Ltd
Original Assignee
Minolta Co Ltd
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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP13763178A priority Critical patent/JPS5564204A/en
Publication of JPS5564204A publication Critical patent/JPS5564204A/en
Pending legal-status Critical Current

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
JP13763178A 1978-11-07 1978-11-07 Zoom lens barrel capable of making fixed magnification image pickup Pending JPS5564204A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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