JPS5772128A - Focusing controller in zoom lens - Google Patents

Focusing controller in zoom lens

Info

Publication number
JPS5772128A
JPS5772128A JP14873380A JP14873380A JPS5772128A JP S5772128 A JPS5772128 A JP S5772128A JP 14873380 A JP14873380 A JP 14873380A JP 14873380 A JP14873380 A JP 14873380A JP S5772128 A JPS5772128 A JP S5772128A
Authority
JP
Japan
Prior art keywords
zooming
shaft
focus adjustment
lens
irrespectively
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
JP14873380A
Other languages
Japanese (ja)
Inventor
Koji Ichie
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.)
ERUMOSHIYA KK
Elmo Co Ltd
Original Assignee
ERUMOSHIYA KK
Elmo 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 ERUMOSHIYA KK, Elmo Co Ltd filed Critical ERUMOSHIYA KK
Priority to JP14873380A priority Critical patent/JPS5772128A/en
Publication of JPS5772128A publication Critical patent/JPS5772128A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

PURPOSE:To perform focal length adjustment and focus adjustment mutually irrespectively by fixing the foremost lens to a shaft slidable in the optical axis direction in a zoom lens barrel, and using the shafts for zooming as guides thereby perfoming focus adjustment. CONSTITUTION:The lens frame 9 of the foremost lens group 3b is fixed to a shaft 10, and are guided and supported by shafts 11, 12 for zooming slidably in the optical axis direction. The trailing end of the shaft 10 projects from a stationary lens barrel 8, and is brought in pressure contact with a cam 15 having a manual adjusting knob 28. With this constitution, at the time of zooming, a ring 24 is turned, and pins 18, 20 are adjusted of positions by cam grooves 19, 21, by which movable lens groups 4, 5 are moved. At this time, the shaft 10 does not displace at all. At the time of focus adjustment, the knob 28 is turned, then the lens group 3b is displaced by the turning of the cam 15 so that the focus is adjusted irrespectively of the zooming. Thereby, the focus adjustment and the zooming are carried out mutually irrespectively.
JP14873380A 1980-10-23 1980-10-23 Focusing controller in zoom lens Pending JPS5772128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14873380A JPS5772128A (en) 1980-10-23 1980-10-23 Focusing controller in zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14873380A JPS5772128A (en) 1980-10-23 1980-10-23 Focusing controller in zoom lens

Publications (1)

Publication Number Publication Date
JPS5772128A true JPS5772128A (en) 1982-05-06

Family

ID=15459385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14873380A Pending JPS5772128A (en) 1980-10-23 1980-10-23 Focusing controller in zoom lens

Country Status (1)

Country Link
JP (1) JPS5772128A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474563A2 (en) * 1990-09-05 1992-03-11 Sony Corporation Lens barrel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0474563A2 (en) * 1990-09-05 1992-03-11 Sony Corporation Lens barrel
US5231473A (en) * 1990-09-05 1993-07-27 Sony Corporation Lens barrel

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