JPS5477132A - Lens structure - Google Patents

Lens structure

Info

Publication number
JPS5477132A
JPS5477132A JP14325877A JP14325877A JPS5477132A JP S5477132 A JPS5477132 A JP S5477132A JP 14325877 A JP14325877 A JP 14325877A JP 14325877 A JP14325877 A JP 14325877A JP S5477132 A JPS5477132 A JP S5477132A
Authority
JP
Japan
Prior art keywords
optical axis
holding frame
lens holding
iris
moved
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
JP14325877A
Other languages
Japanese (ja)
Inventor
Hiroshi Sawano
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP14325877A priority Critical patent/JPS5477132A/en
Publication of JPS5477132A publication Critical patent/JPS5477132A/en
Pending legal-status Critical Current

Links

Landscapes

  • Diaphragms For Cameras (AREA)
  • Lens Barrels (AREA)

Abstract

PURPOSE: To compensate the aperture of a zoom lens with the use of a simple construction by shifting a lens holding frame guide groove, which is formed in a stationary drum, in parallel with an optical axis so that the lens holding frame is linearly moved and turned when focused.
CONSTITUTION: When a focal length adjusting ring 4 is turned, a cam cylinder 5 is integrally moved so that lens holding frames 6 and 7 are moved along the optical axis by cam grooves 5a and 5b and drive pins 9 and 10 to effect the focusing operation. Since, in this instance, a movement guide groove 2d formed in a stationary drum 2 is displaced in parallel with the optical axis, a holding frame 7 is linearly moved and thrned. This turn effects the rotations of an iris blade arranging ring 11 to compensate an iris blade 12. As a result, the iris compensation during the focusing operation of the zoom lens can be accomplished easily and reliably with the use of a simple construction.
COPYRIGHT: (C)1979,JPO&Japio
JP14325877A 1977-12-01 1977-12-01 Lens structure Pending JPS5477132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14325877A JPS5477132A (en) 1977-12-01 1977-12-01 Lens structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14325877A JPS5477132A (en) 1977-12-01 1977-12-01 Lens structure

Publications (1)

Publication Number Publication Date
JPS5477132A true JPS5477132A (en) 1979-06-20

Family

ID=15334554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14325877A Pending JPS5477132A (en) 1977-12-01 1977-12-01 Lens structure

Country Status (1)

Country Link
JP (1) JPS5477132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961804A (en) * 1982-09-30 1984-04-09 Matsushita Electric Ind Co Ltd lens barrel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961804A (en) * 1982-09-30 1984-04-09 Matsushita Electric Ind Co Ltd lens barrel

Similar Documents

Publication Publication Date Title
JPS55166610A (en) Cam mechanism of zoom lens
JPS557764A (en) Zoom lens device capable of macro photography
JPS55133006A (en) Close-up photographing changeover device of zoom lens barrel
JPS5740211A (en) Construction of zoom lens capable of extreme proximity photographing
JPS5526538A (en) Optical system having movable lens group for focusing
JPS5614225A (en) Focusing device
JPS5595933A (en) Automatic focusing device of lens barrel
JPS5237445A (en) Lens system rendering variable characteristics of an image plane
JPS5266445A (en) Zoom lens
JPS5562412A (en) Fixed magnification image pickup device in single operation ring type zoom lens barrel
JPS5569111A (en) Single operation ring type zoom lens barrel
JPS54118240A (en) Safety device of zoom lens
JPS5776506A (en) Zoom lens barrel
JPS5559410A (en) Zoom lens barrel which permits operation in two kinds of directions
JPS5737306A (en) Lens barrel for high variable magnification zoom lens
JPS52132851A (en) Optical detector of scanning type
JPS55106409A (en) Lens barrel of zoom lens capable of taking close-up
JPS53142229A (en) Lens mover in lens-barrel
JPS6435516A (en) Lens barrel for zoom lens
JPS5619010A (en) Lens barrel for flash photography
JPS5677808A (en) Preventing device for internal reflection of zoom lens
JPS55120006A (en) Focus adjsutment operating force balance mechanism in photographic lens
JPS5666809A (en) Harmful light shielding device of zoom lens
JPS5536887A (en) Macro mechanism of zoom lens
JPS53147507A (en) Focus position controller