JPS52139450A - Magnifying lens capable of simply transferring focal distance range - Google Patents

Magnifying lens capable of simply transferring focal distance range

Info

Publication number
JPS52139450A
JPS52139450A JP5626576A JP5626576A JPS52139450A JP S52139450 A JPS52139450 A JP S52139450A JP 5626576 A JP5626576 A JP 5626576A JP 5626576 A JP5626576 A JP 5626576A JP S52139450 A JPS52139450 A JP S52139450A
Authority
JP
Japan
Prior art keywords
distance range
focal distance
magnifying lens
lens capable
simply transferring
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
JP5626576A
Other languages
Japanese (ja)
Other versions
JPS617608B2 (en
Inventor
Kazuo Tanaka
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP5626576A priority Critical patent/JPS52139450A/en
Priority to US05/784,787 priority patent/US4146305A/en
Publication of JPS52139450A publication Critical patent/JPS52139450A/en
Publication of JPS617608B2 publication Critical patent/JPS617608B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)

Abstract

PURPOSE: To maintain the lens diameter of a rear group of a focusing lens group of a built-in extender system at a small level by interposing a movable lens group between the front and rear groups of the focusing lens group and by interposing a magnifying lens group between the movable lens group and the front group.
COPYRIGHT: (C)1977,JPO&Japio
JP5626576A 1976-04-09 1976-05-17 Magnifying lens capable of simply transferring focal distance range Granted JPS52139450A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5626576A JPS52139450A (en) 1976-05-17 1976-05-17 Magnifying lens capable of simply transferring focal distance range
US05/784,787 US4146305A (en) 1976-04-09 1977-04-05 Variable lens which can have its focal distance range easily changed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5626576A JPS52139450A (en) 1976-05-17 1976-05-17 Magnifying lens capable of simply transferring focal distance range

Publications (2)

Publication Number Publication Date
JPS52139450A true JPS52139450A (en) 1977-11-21
JPS617608B2 JPS617608B2 (en) 1986-03-07

Family

ID=13022238

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5626576A Granted JPS52139450A (en) 1976-04-09 1976-05-17 Magnifying lens capable of simply transferring focal distance range

Country Status (1)

Country Link
JP (1) JPS52139450A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108510A (en) * 1981-12-23 1983-06-28 Canon Inc Switching type variable power lens system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108510A (en) * 1981-12-23 1983-06-28 Canon Inc Switching type variable power lens system
JPS6155091B2 (en) * 1981-12-23 1986-11-26 Canon Kk

Also Published As

Publication number Publication date
JPS617608B2 (en) 1986-03-07

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