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JPS527723A - Photographic lens of large aperture ratio - Google Patents

Photographic lens of large aperture ratio

Info

Publication number
JPS527723A
JPS527723A JP8351375A JP8351375A JPS527723A JP S527723 A JPS527723 A JP S527723A JP 8351375 A JP8351375 A JP 8351375A JP 8351375 A JP8351375 A JP 8351375A JP S527723 A JPS527723 A JP S527723A
Authority
JP
Japan
Prior art keywords
aperture ratio
photographic lens
large aperture
widening
air gap
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.)
Pending
Application number
JP8351375A
Other languages
Japanese (ja)
Inventor
Masamichi Kitagawa
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP8351375A priority Critical patent/JPS527723A/en
Publication of JPS527723A publication Critical patent/JPS527723A/en
Pending legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To compensate aberration well even at a short distance by widening an air gap between the lens groups.
COPYRIGHT: (C)1977,JPO&Japio
JP8351375A 1975-07-09 1975-07-09 Photographic lens of large aperture ratio Pending JPS527723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8351375A JPS527723A (en) 1975-07-09 1975-07-09 Photographic lens of large aperture ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8351375A JPS527723A (en) 1975-07-09 1975-07-09 Photographic lens of large aperture ratio

Publications (1)

Publication Number Publication Date
JPS527723A true JPS527723A (en) 1977-01-21

Family

ID=13804554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8351375A Pending JPS527723A (en) 1975-07-09 1975-07-09 Photographic lens of large aperture ratio

Country Status (1)

Country Link
JP (1) JPS527723A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528038A (en) * 1978-08-21 1980-02-28 Nippon Kogaku Kk <Nikon> Lens system for close distance photographing
US4708445A (en) * 1983-11-07 1987-11-24 Olympus Optical Co., Ltd. Large aperture ratio photographic lens system
US4871243A (en) * 1987-04-03 1989-10-03 Canon Kabushiki Kaisha Photographic lens of improved near distance performance
JP2007304224A (en) * 2006-05-10 2007-11-22 Nidec Copal Corp Reading lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49121528A (en) * 1973-03-20 1974-11-20
JPS49121527A (en) * 1973-03-20 1974-11-20

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49121528A (en) * 1973-03-20 1974-11-20
JPS49121527A (en) * 1973-03-20 1974-11-20

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528038A (en) * 1978-08-21 1980-02-28 Nippon Kogaku Kk <Nikon> Lens system for close distance photographing
JPH0432365B2 (en) * 1978-08-21 1992-05-29
US4708445A (en) * 1983-11-07 1987-11-24 Olympus Optical Co., Ltd. Large aperture ratio photographic lens system
US4871243A (en) * 1987-04-03 1989-10-03 Canon Kabushiki Kaisha Photographic lens of improved near distance performance
JP2007304224A (en) * 2006-05-10 2007-11-22 Nidec Copal Corp Reading lens

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