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JPS57144506A - Interference preventing device for zoom lens - Google Patents

Interference preventing device for zoom lens

Info

Publication number
JPS57144506A
JPS57144506A JP3063481A JP3063481A JPS57144506A JP S57144506 A JPS57144506 A JP S57144506A JP 3063481 A JP3063481 A JP 3063481A JP 3063481 A JP3063481 A JP 3063481A JP S57144506 A JPS57144506 A JP S57144506A
Authority
JP
Japan
Prior art keywords
lens group
lens
ring
optical axis
mobile
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
JP3063481A
Other languages
Japanese (ja)
Inventor
Makoto Ando
Takeshi Egawa
Yukio Miki
Fumio Yoshida
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 JP3063481A priority Critical patent/JPS57144506A/en
Publication of JPS57144506A publication Critical patent/JPS57144506A/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 prevent the mutual interference between the 1st and 2nd lens groups, by controlling the movable range toward the optical axis of the 1st lens group by means of a control member and in accordance with the position of the optical axis of the 2nd lens group. CONSTITUTION:A zoom lens set at a short focal point and an infinite distance of a subject is attached to a camera body B, and then control ring 8 is turned to move a mobile barrel 9 forward. Thus a lens groupIis also drawn out toward the optical axis by the 1st mobile frame 11. At the same time, the lens groups II and III move forward by the 2nd and 3rd mobile frames 12 and 13 respectively to carry out the zooming. The focusing lens group IV is drawn out by turning a driving ring 5, and a pin 7 provided to the ring 5 controls the rotational angle of the ring 5, i.e., the moving range of the lens group IV. As a result, the collision between the backward moving lens group III and the focusing lens group IV which is caused by the zooming at the short focal point side, i.e., the interference between these two lens groups can be prevented.
JP3063481A 1981-03-04 1981-03-04 Interference preventing device for zoom lens Pending JPS57144506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3063481A JPS57144506A (en) 1981-03-04 1981-03-04 Interference preventing device for zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3063481A JPS57144506A (en) 1981-03-04 1981-03-04 Interference preventing device for zoom lens

Publications (1)

Publication Number Publication Date
JPS57144506A true JPS57144506A (en) 1982-09-07

Family

ID=12309268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3063481A Pending JPS57144506A (en) 1981-03-04 1981-03-04 Interference preventing device for zoom lens

Country Status (1)

Country Link
JP (1) JPS57144506A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264963A (en) * 1991-05-23 1993-11-23 Minolta Camera Kabushiki Kaisha Varifocal lens assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264963A (en) * 1991-05-23 1993-11-23 Minolta Camera Kabushiki Kaisha Varifocal lens assembly

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