TW258791B - Zoom lens - Google Patents

Zoom lens

Info

Publication number
TW258791B
TW258791B TW83106377A TW83106377A TW258791B TW 258791 B TW258791 B TW 258791B TW 83106377 A TW83106377 A TW 83106377A TW 83106377 A TW83106377 A TW 83106377A TW 258791 B TW258791 B TW 258791B
Authority
TW
Taiwan
Prior art keywords
lens
refractive power
wide angle
lens group
units
Prior art date
Application number
TW83106377A
Other languages
Chinese (zh)
Inventor
Akihiro Nishio
Makoto Misaka
Takashi Kato
Original Assignee
Canon 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
Priority claimed from JP5212197A external-priority patent/JP3067481B2/en
Priority claimed from JP32140193A external-priority patent/JP3144191B2/en
Priority claimed from JP32584293A external-priority patent/JP3144192B2/en
Priority claimed from JP15031694A external-priority patent/JP3183047B2/en
Application filed by Canon Kk filed Critical Canon Kk
Application granted granted Critical
Publication of TW258791B publication Critical patent/TW258791B/en

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  • Lenses (AREA)

Abstract

A zoom lens is disclosed, comprising a front lens group having a first, a second and a third lens units, totaling at least three lens units, and whose overall refractive power for the wide angle end is positive and a rear lens group having a lens unit of positive refractive power and another lens unit of negative refractive power, in which when zooming from the wide angle to the telephoto end, the first, the second and the third lens units all axially move in such relation that the overall refractive power of the front lens group is weaker in the telephoto end than in the wide angle end, and the lens units in the rear lens group all axially move in such relation that their separation narrows.
TW83106377A 1993-07-14 1994-07-13 Zoom lens TW258791B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP17431693 1993-07-14
JP5212197A JP3067481B2 (en) 1993-08-04 1993-08-04 Zoom lens
JP32140193A JP3144191B2 (en) 1993-11-26 1993-11-26 Zoom lens
JP32584293A JP3144192B2 (en) 1993-11-29 1993-11-29 Zoom lens
JP15031694A JP3183047B2 (en) 1994-06-07 1994-06-07 Zoom lens

Publications (1)

Publication Number Publication Date
TW258791B true TW258791B (en) 1995-10-01

Family

ID=51401788

Family Applications (1)

Application Number Title Priority Date Filing Date
TW83106377A TW258791B (en) 1993-07-14 1994-07-13 Zoom lens

Country Status (1)

Country Link
TW (1) TW258791B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI476442B (en) * 2013-02-26 2015-03-11 Sintai Optical Shenzhen Co Ltd Zoom lens
TWI619964B (en) * 2013-04-01 2018-04-01 新力股份有限公司 Imaging lens and imaging apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI476442B (en) * 2013-02-26 2015-03-11 Sintai Optical Shenzhen Co Ltd Zoom lens
TWI619964B (en) * 2013-04-01 2018-04-01 新力股份有限公司 Imaging lens and imaging apparatus

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