JPS6468709A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS6468709A
JPS6468709A JP62226185A JP22618587A JPS6468709A JP S6468709 A JPS6468709 A JP S6468709A JP 62226185 A JP62226185 A JP 62226185A JP 22618587 A JP22618587 A JP 22618587A JP S6468709 A JPS6468709 A JP S6468709A
Authority
JP
Japan
Prior art keywords
lens
refractive index
negative
positive
constitution
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
JP62226185A
Other languages
Japanese (ja)
Other versions
JP2526923B2 (en
Inventor
Atsushi Sekine
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.)
Nikon Corp
Original Assignee
Nikon Corp
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 Nikon Corp filed Critical Nikon Corp
Priority to JP62226185A priority Critical patent/JP2526923B2/en
Publication of JPS6468709A publication Critical patent/JPS6468709A/en
Application granted granted Critical
Publication of JP2526923B2 publication Critical patent/JP2526923B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE:To perform excellent aberration compensation with simple constitution having a large zoom ratio by specifying the refractive index of a negative lens with the least refractive index constituting a 2nd lens group. CONSTITUTION:When the zoom lens of positive, negative, positive, and positive four-group constitution is put in zooming operation from the wide-angle end to the telephoto end, 1st and 3rd lens groups G1 and G3 are fixed and the 2nd and 4th lens groups G2 and G4 are moved relatively along the optical axis to vary the power. At the time of focusing, the 4th lens group is moved along the optical axis to perform the focusing. Then the refractive index of the negative lens with the least refractive index among the negative lenses constituting the 2nd lens group G2 is denoted as nmin and nmin<1.65 holds. Consequently, the excellent aberration compensation is performed with the simple constitution.
JP62226185A 1987-09-09 1987-09-09 Zoom lenses Expired - Lifetime JP2526923B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62226185A JP2526923B2 (en) 1987-09-09 1987-09-09 Zoom lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62226185A JP2526923B2 (en) 1987-09-09 1987-09-09 Zoom lenses

Publications (2)

Publication Number Publication Date
JPS6468709A true JPS6468709A (en) 1989-03-14
JP2526923B2 JP2526923B2 (en) 1996-08-21

Family

ID=16841221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62226185A Expired - Lifetime JP2526923B2 (en) 1987-09-09 1987-09-09 Zoom lenses

Country Status (1)

Country Link
JP (1) JP2526923B2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01153802A (en) * 1987-06-30 1989-06-16 Hitachi Constr Mach Co Ltd Hydraulic driving device
JPH0328814A (en) * 1989-06-26 1991-02-07 Matsushita Electric Ind Co Ltd Zoom lens
JPH0333710A (en) * 1989-06-29 1991-02-14 Matsushita Electric Ind Co Ltd Aspherical zoom lens
JPH03215810A (en) * 1990-01-20 1991-09-20 Canon Inc Rear focus type zoom lens
JPH0413109A (en) * 1990-05-07 1992-01-17 Konica Corp Compact zoom lens
JPH0413110A (en) * 1990-05-07 1992-01-17 Konica Corp Compact zoom lens
JPH04102815A (en) * 1990-08-21 1992-04-03 Canon Inc Zoom lens
US5301064A (en) * 1990-04-06 1994-04-05 Hitachi, Ltd. Rear focusing type zoom lens system
US5353157A (en) * 1990-08-21 1994-10-04 Canon Kabushiki Kaisha Rear focusing zoom lens
US5359457A (en) * 1991-10-03 1994-10-25 Minolta Camera Co., Ltd. Wide-angle zoom lens system
JPH07113955A (en) * 1993-10-18 1995-05-02 Minolta Co Ltd Zoom lens
US6392817B1 (en) 1999-07-26 2002-05-21 Canon Kabushiki Kaisha Rear focus type zoom lens and optical apparatus using the same
JP2006267862A (en) * 2005-03-25 2006-10-05 Fujinon Corp Zoom lens

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133916A (en) * 1984-12-03 1986-06-21 Minolta Camera Co Ltd Telephone zoom lens
JPS6224213A (en) * 1985-07-25 1987-02-02 Canon Inc Zoom lens
JPS6381313A (en) * 1986-09-25 1988-04-12 Canon Inc Zoom lens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133916A (en) * 1984-12-03 1986-06-21 Minolta Camera Co Ltd Telephone zoom lens
JPS6224213A (en) * 1985-07-25 1987-02-02 Canon Inc Zoom lens
JPS6381313A (en) * 1986-09-25 1988-04-12 Canon Inc Zoom lens

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01153802A (en) * 1987-06-30 1989-06-16 Hitachi Constr Mach Co Ltd Hydraulic driving device
JPH0328814A (en) * 1989-06-26 1991-02-07 Matsushita Electric Ind Co Ltd Zoom lens
JPH0333710A (en) * 1989-06-29 1991-02-14 Matsushita Electric Ind Co Ltd Aspherical zoom lens
JPH03215810A (en) * 1990-01-20 1991-09-20 Canon Inc Rear focus type zoom lens
US5301064A (en) * 1990-04-06 1994-04-05 Hitachi, Ltd. Rear focusing type zoom lens system
JPH0413109A (en) * 1990-05-07 1992-01-17 Konica Corp Compact zoom lens
JPH0413110A (en) * 1990-05-07 1992-01-17 Konica Corp Compact zoom lens
JPH04102815A (en) * 1990-08-21 1992-04-03 Canon Inc Zoom lens
US5353157A (en) * 1990-08-21 1994-10-04 Canon Kabushiki Kaisha Rear focusing zoom lens
US5359457A (en) * 1991-10-03 1994-10-25 Minolta Camera Co., Ltd. Wide-angle zoom lens system
JPH07113955A (en) * 1993-10-18 1995-05-02 Minolta Co Ltd Zoom lens
US6392817B1 (en) 1999-07-26 2002-05-21 Canon Kabushiki Kaisha Rear focus type zoom lens and optical apparatus using the same
JP2006267862A (en) * 2005-03-25 2006-10-05 Fujinon Corp Zoom lens

Also Published As

Publication number Publication date
JP2526923B2 (en) 1996-08-21

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