TW255013B - Zoom lens - Google Patents

Zoom lens

Info

Publication number
TW255013B
TW255013B TW083108520A TW83108520A TW255013B TW 255013 B TW255013 B TW 255013B TW 083108520 A TW083108520 A TW 083108520A TW 83108520 A TW83108520 A TW 83108520A TW 255013 B TW255013 B TW 255013B
Authority
TW
Taiwan
Prior art keywords
lens group
lens
refractive power
optical axis
air gap
Prior art date
Application number
TW083108520A
Other languages
Chinese (zh)
Inventor
Motoyuki Ohtake
Original Assignee
Nicon 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 JP5171494A external-priority patent/JPH0727979A/en
Priority claimed from JP5180533A external-priority patent/JPH0735979A/en
Priority claimed from JP5323284A external-priority patent/JPH07151968A/en
Priority claimed from JP5323285A external-priority patent/JPH07151969A/en
Priority claimed from JP07003394A external-priority patent/JP3357930B2/en
Application filed by Nicon Kk filed Critical Nicon Kk
Application granted granted Critical
Publication of TW255013B publication Critical patent/TW255013B/en

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  • Lenses (AREA)

Abstract

A zoom lens includes, in order from an object side, a first lens group having a positive refractive power, a second lens group having a negative refractive power, a third lens group having a positive refractive power, a fourth lens group having a positive refractive power, and a fifth lens group having a negative refractive power. When the lens groups are moved from a wide-angle end to a telescopic end, at least the first lens group and the fifth lens group are moved toward the object side. In this case, the air gap along an optical axis between the first lens group and the second lens group, and the air gap along an optical axis between the third lens group and the fourth lens group are increased, respectively. At the same time, the air gap along an optical axis between the fourth lens group and the fifth lens group is decreased. In the zoom lens, at least one lens group among the second to fourth lens groups carries out a focusing operation.
TW083108520A 1993-07-12 1994-09-15 Zoom lens TW255013B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP5171494A JPH0727979A (en) 1993-07-12 1993-07-12 Zoom lens
JP5180533A JPH0735979A (en) 1993-07-22 1993-07-22 Zoom lens
JP5323284A JPH07151968A (en) 1993-11-29 1993-11-29 Zoom lens
JP5323285A JPH07151969A (en) 1993-11-29 1993-11-29 Zoom lens
JP07003394A JP3357930B2 (en) 1994-03-15 1994-03-15 Zoom lens

Publications (1)

Publication Number Publication Date
TW255013B true TW255013B (en) 1995-08-21

Family

ID=51401567

Family Applications (1)

Application Number Title Priority Date Filing Date
TW083108520A TW255013B (en) 1993-07-12 1994-09-15 Zoom lens

Country Status (1)

Country Link
TW (1) TW255013B (en)

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