JPS5521007A - Zoom lens structure body - Google Patents

Zoom lens structure body

Info

Publication number
JPS5521007A
JPS5521007A JP9247578A JP9247578A JPS5521007A JP S5521007 A JPS5521007 A JP S5521007A JP 9247578 A JP9247578 A JP 9247578A JP 9247578 A JP9247578 A JP 9247578A JP S5521007 A JPS5521007 A JP S5521007A
Authority
JP
Japan
Prior art keywords
zoom
lens
ring
holding frame
front group
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
JP9247578A
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 JP9247578A priority Critical patent/JPS5521007A/en
Publication of JPS5521007A publication Critical patent/JPS5521007A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE: To secure the margin for movement necessary for variable power and obtain the gripe width sufficient for stable operation by such construction wherein the ring zoom of rectilinear type 1 ring zoom type is protruded forward from the lens barrel like a hood.
CONSTITUTION: In the state where a short focus distance is taken, the front group lens L1 is held advanced and the rear group lens L2 held retreated. Here, when a zoom ring 3 is pulled out forward in the optical axis direction, the rear group lens L2 also advances together with the rear group holding frame 6. When a cam ring 2 turns at this same instant, the front group holding frame 7 and front group lens L1 also retreat and the zoom lens system shifts to a long focal length. At the same time the front part 3c of the zoom ring 3 overhangs forward from the front face of the front group holding frame 7 to cut off the harmful light entering from the outside of the angle of view, thereby playing the role of a hood. This constitution enables the margin for movement of the zoom lens to be taken large and enables sufficient gripe width to be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP9247578A 1978-07-31 1978-07-31 Zoom lens structure body Pending JPS5521007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9247578A JPS5521007A (en) 1978-07-31 1978-07-31 Zoom lens structure body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9247578A JPS5521007A (en) 1978-07-31 1978-07-31 Zoom lens structure body

Publications (1)

Publication Number Publication Date
JPS5521007A true JPS5521007A (en) 1980-02-14

Family

ID=14055329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9247578A Pending JPS5521007A (en) 1978-07-31 1978-07-31 Zoom lens structure body

Country Status (1)

Country Link
JP (1) JPS5521007A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951309U (en) * 1982-09-27 1984-04-04 旭光学工業株式会社 Floating lens feeding mechanism
JPS62131218A (en) * 1985-12-02 1987-06-13 Asahi Optical Co Ltd Body tube for zoom lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5951309U (en) * 1982-09-27 1984-04-04 旭光学工業株式会社 Floating lens feeding mechanism
JPS62131218A (en) * 1985-12-02 1987-06-13 Asahi Optical Co Ltd Body tube for zoom lens

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