JPS5463752A - Rear converter lens for telephotograph - Google Patents

Rear converter lens for telephotograph

Info

Publication number
JPS5463752A
JPS5463752A JP12924477A JP12924477A JPS5463752A JP S5463752 A JPS5463752 A JP S5463752A JP 12924477 A JP12924477 A JP 12924477A JP 12924477 A JP12924477 A JP 12924477A JP S5463752 A JPS5463752 A JP S5463752A
Authority
JP
Japan
Prior art keywords
lens
refracting power
optical system
positive refracting
lenses
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
JP12924477A
Other languages
Japanese (ja)
Inventor
Hideo Shizume
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 JP12924477A priority Critical patent/JPS5463752A/en
Publication of JPS5463752A publication Critical patent/JPS5463752A/en
Pending legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To obtain a good converter lens which may be installed between the master lens and camera body without any mechanical interference by constituting the optical system with 5-group 6-element lenses and so selecting optical specifications as to satisfy the specified conditions.
CONSTITUTION: The optical system is formed by the lens groups of 5 groups 1 thru 5 by six lenses of biconcave, convex lenses L1, L2 of positive refracting powers, a lens L3 of a negative refracting power, a biconvex lens L4 of a positive refracting power, a negative refracting power biconcave lens L5 and a positive refracting power biconvex lens L6. If these are arrayed at the intermediate of the master lens and camera body by so selecting their focal lengths (f), refractive indices (n), axial distances (a), lens air spacing thicknesses (d), Abbe numbers υ, etc. as to satisfy the conditions of the formulas (1) thru (11), then the front side main point of this optical system may be approached to the image forming point of the master lens, whereby mechanical interferences are reduced. In addition, correction of various aberrations is made easy and sure by the small refractive powers.
COPYRIGHT: (C)1979,JPO&Japio
JP12924477A 1977-10-29 1977-10-29 Rear converter lens for telephotograph Pending JPS5463752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12924477A JPS5463752A (en) 1977-10-29 1977-10-29 Rear converter lens for telephotograph

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12924477A JPS5463752A (en) 1977-10-29 1977-10-29 Rear converter lens for telephotograph

Publications (1)

Publication Number Publication Date
JPS5463752A true JPS5463752A (en) 1979-05-22

Family

ID=15004750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12924477A Pending JPS5463752A (en) 1977-10-29 1977-10-29 Rear converter lens for telephotograph

Country Status (1)

Country Link
JP (1) JPS5463752A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112421A (en) * 1974-07-19 1976-01-31 Hitachi Shipbuilding Eng Co CHITSUSOSANKABUTSUYOKU SEINENSHOHOHO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112421A (en) * 1974-07-19 1976-01-31 Hitachi Shipbuilding Eng Co CHITSUSOSANKABUTSUYOKU SEINENSHOHOHO

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