JPH0310923B2 - - Google Patents

Info

Publication number
JPH0310923B2
JPH0310923B2 JP57101078A JP10107882A JPH0310923B2 JP H0310923 B2 JPH0310923 B2 JP H0310923B2 JP 57101078 A JP57101078 A JP 57101078A JP 10107882 A JP10107882 A JP 10107882A JP H0310923 B2 JPH0310923 B2 JP H0310923B2
Authority
JP
Japan
Prior art keywords
focus
lens group
amount
zoom
lens
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.)
Expired - Lifetime
Application number
JP57101078A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58217907A (ja
Inventor
Eiji Kitsutaka
Mineo Kubota
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.)
NISUKA KK
Original Assignee
NISUKA 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 NISUKA KK filed Critical NISUKA 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 JPS58217907A (ja) 1983-12-19
JPH0310923B2 true JPH0310923B2 (de) 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 (de)

Families Citing this family (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
GB2181262B (en) 1985-10-02 1989-12-13 Canon Kk Automatic focusing system
JPS62215220A (ja) * 1986-03-17 1987-09-21 Canon Inc 自動合焦装置
JP2681912B2 (ja) * 1986-01-22 1997-11-26 株式会社ニコン 自動合焦装置
JP2601839B2 (ja) * 1987-09-21 1997-04-16 富士写真フイルム 株式会社 ズームレンズの自動焦点調節装置
JPH0789174B2 (ja) * 1987-09-21 1995-09-27 富士写真フイルム株式会社 自動焦点調節装置
JPH01131509A (ja) * 1988-06-07 1989-05-24 Canon Inc 変倍光学系
JPH01118110A (ja) * 1988-06-07 1989-05-10 Canon Inc 自動合焦装置
JP2679588B2 (ja) * 1993-09-13 1997-11-19 株式会社ニコン 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
JP2679587B2 (ja) * 1993-09-13 1997-11-19 株式会社ニコン 自動合焦装置

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

Also Published As

Publication number Publication date
JPS58217907A (ja) 1983-12-19

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