JPS58217907A - ズームレンズのフォーカシング方法 - Google Patents

ズームレンズのフォーカシング方法

Info

Publication number
JPS58217907A
JPS58217907A JP57101078A JP10107882A JPS58217907A JP S58217907 A JPS58217907 A JP S58217907A JP 57101078 A JP57101078 A JP 57101078A JP 10107882 A JP10107882 A JP 10107882A JP S58217907 A JPS58217907 A JP S58217907A
Authority
JP
Japan
Prior art keywords
lens group
focus
zoom
lens
amount
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.)
Granted
Application number
JP57101078A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0310923B2 (enrdf_load_stackoverflow
Inventor
Eiji Kikko
英治 橘高
Mineo Kubota
窪田　峰夫
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.)
Nippon Seimitsu Kogyo KK
Original Assignee
Nippon Seimitsu Kogyo KK
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 Nippon Seimitsu Kogyo KK filed Critical Nippon Seimitsu Kogyo KK
Priority to JP57101078A priority Critical patent/JPS58217907A/ja
Publication of JPS58217907A publication Critical patent/JPS58217907A/ja
Publication of JPH0310923B2 publication Critical patent/JPH0310923B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
    • G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
    • G02B15/144113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
JP57101078A 1982-06-12 1982-06-12 ズームレンズのフォーカシング方法 Granted JPS58217907A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57101078A JPS58217907A (ja) 1982-06-12 1982-06-12 ズームレンズのフォーカシング方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57101078A JPS58217907A (ja) 1982-06-12 1982-06-12 ズームレンズのフォーカシング方法

Publications (2)

Publication Number Publication Date
JPS58217907A true JPS58217907A (ja) 1983-12-19
JPH0310923B2 JPH0310923B2 (enrdf_load_stackoverflow) 1991-02-14

Family

ID=14291058

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57101078A Granted JPS58217907A (ja) 1982-06-12 1982-06-12 ズームレンズのフォーカシング方法

Country Status (1)

Country Link
JP (1) JPS58217907A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278519A (ja) * 1985-10-02 1987-04-10 Canon Inc 自動合焦装置
JPS62170924A (ja) * 1986-01-22 1987-07-28 Nippon Kogaku Kk <Nikon> 自動合焦装置
JPS62215220A (ja) * 1986-03-17 1987-09-21 Canon Inc 自動合焦装置
JPS6479711A (en) * 1987-09-21 1989-03-24 Fuji Photo Film Co Ltd Automatic focusing adjuster
JPS6479713A (en) * 1987-09-21 1989-03-24 Fuji Photo Film Co Ltd Automatic focusing device for zoom lens
JPH01118110A (ja) * 1988-06-07 1989-05-10 Canon Inc 自動合焦装置
JPH01131509A (ja) * 1988-06-07 1989-05-24 Canon Inc 変倍光学系
JPH06175004A (ja) * 1993-09-13 1994-06-24 Nikon Corp 自動合焦装置
JPH06175005A (ja) * 1993-09-13 1994-06-24 Nikon Corp 自動合焦装置および自動合焦装置を備えたカメラに装着可能な撮影光学系
US6208811B1 (en) 1985-10-02 2001-03-27 Canon Kabuhsiki Kaisha Automatic focussing system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5893014A (ja) * 1981-11-30 1983-06-02 Ricoh Co Ltd レンズ移動量信号発生装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5893014A (ja) * 1981-11-30 1983-06-02 Ricoh Co Ltd レンズ移動量信号発生装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6278519A (ja) * 1985-10-02 1987-04-10 Canon Inc 自動合焦装置
US6208811B1 (en) 1985-10-02 2001-03-27 Canon Kabuhsiki Kaisha Automatic focussing system
JPS62170924A (ja) * 1986-01-22 1987-07-28 Nippon Kogaku Kk <Nikon> 自動合焦装置
JPS62215220A (ja) * 1986-03-17 1987-09-21 Canon Inc 自動合焦装置
JPS6479711A (en) * 1987-09-21 1989-03-24 Fuji Photo Film Co Ltd Automatic focusing adjuster
JPS6479713A (en) * 1987-09-21 1989-03-24 Fuji Photo Film Co Ltd Automatic focusing device for zoom lens
JPH01118110A (ja) * 1988-06-07 1989-05-10 Canon Inc 自動合焦装置
JPH01131509A (ja) * 1988-06-07 1989-05-24 Canon Inc 変倍光学系
JPH06175004A (ja) * 1993-09-13 1994-06-24 Nikon Corp 自動合焦装置
JPH06175005A (ja) * 1993-09-13 1994-06-24 Nikon Corp 自動合焦装置および自動合焦装置を備えたカメラに装着可能な撮影光学系

Also Published As

Publication number Publication date
JPH0310923B2 (enrdf_load_stackoverflow) 1991-02-14

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