JPS5655913A - Telephoto lens - Google Patents

Telephoto lens

Info

Publication number
JPS5655913A
JPS5655913A JP12389280A JP12389280A JPS5655913A JP S5655913 A JPS5655913 A JP S5655913A JP 12389280 A JP12389280 A JP 12389280A JP 12389280 A JP12389280 A JP 12389280A JP S5655913 A JPS5655913 A JP S5655913A
Authority
JP
Japan
Prior art keywords
lens group
movable
refracting power
stationary
focusing
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
JP12389280A
Other languages
Japanese (ja)
Inventor
Kikuo Momiyama
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP12389280A priority Critical patent/JPS5655913A/en
Publication of JPS5655913A publication Critical patent/JPS5655913A/en
Pending legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To eliminate degradation in aberrations by constituting the rear lens group placed spacially from the front lens group by a lens group movable for the purpose of focusing and a stationary lens group for the purpose of aberration correction.
CONSTITUTION: Rear lens groups B, C of negative refracting power are disposed spacially on the optical axis from the front lens group A of positive refracting power. The rear lens group comprises a stationary lens group B and a movable lens group C. The lens group C movable in the optical axis direction is for the purpose of focusing to the subject and the stationary lens group B is for the purpose of correcting the aberrations produced in the front lens group A, has negative refracting power and has the 1st lens face of which the convex is directed to the subject side and the final lens face of which the concave is directed to the image side.
COPYRIGHT: (C)1981,JPO&Japio
JP12389280A 1980-09-05 1980-09-05 Telephoto lens Pending JPS5655913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12389280A JPS5655913A (en) 1980-09-05 1980-09-05 Telephoto lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12389280A JPS5655913A (en) 1980-09-05 1980-09-05 Telephoto lens

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP49046920A Division JPS6059569B2 (en) 1974-04-25 1974-04-25 telescope lens

Publications (1)

Publication Number Publication Date
JPS5655913A true JPS5655913A (en) 1981-05-16

Family

ID=14871923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12389280A Pending JPS5655913A (en) 1980-09-05 1980-09-05 Telephoto lens

Country Status (1)

Country Link
JP (1) JPS5655913A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838138A (en) * 1972-09-11 1973-06-05
JPS4917723A (en) * 1972-06-07 1974-02-16
JPS50139732A (en) * 1974-04-25 1975-11-08
JPS50151143A (en) * 1974-05-25 1975-12-04
JPS52117126A (en) * 1976-03-26 1977-10-01 Minolta Camera Co Ltd Telephoto lens system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917723A (en) * 1972-06-07 1974-02-16
JPS4838138A (en) * 1972-09-11 1973-06-05
JPS50139732A (en) * 1974-04-25 1975-11-08
JPS50151143A (en) * 1974-05-25 1975-12-04
JPS52117126A (en) * 1976-03-26 1977-10-01 Minolta Camera Co Ltd Telephoto lens system

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