JPS5532046A - Teleconverter - Google Patents

Teleconverter

Info

Publication number
JPS5532046A
JPS5532046A JP10467678A JP10467678A JPS5532046A JP S5532046 A JPS5532046 A JP S5532046A JP 10467678 A JP10467678 A JP 10467678A JP 10467678 A JP10467678 A JP 10467678A JP S5532046 A JPS5532046 A JP S5532046A
Authority
JP
Japan
Prior art keywords
lens
teleconverter
refractive
powers
faces
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
JP10467678A
Other languages
Japanese (ja)
Other versions
JPS6112250B2 (en
Inventor
Sadahiko Tsuji
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 JP10467678A priority Critical patent/JPS5532046A/en
Publication of JPS5532046A publication Critical patent/JPS5532046A/en
Publication of JPS6112250B2 publication Critical patent/JPS6112250B2/ja
Granted legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE: To make balances of afocal powers and refractive powers of respective elements constituting the teleconverter adequate by specifying the radii of curvature of the respective lens faces of the lens system mounted in front of the master lens, spacings between lens faces, refractive indices, etc.
CONSTITUTION: This is the lens system mounted in front of the master lens and is suited for the teleconverter to be mounted to an 8-mm cine camera in particular, wherein the teleconverter is constituted by the specifications from r1 up to r4 out of the specifications expressed by using the symbols consisting of the radii r1 of curvature of each lens face, spacing di between lens faces on each axis, refractive index ni of each lens for the d line and Abbe number μ1. The afocal power is made about 1.4 times so that the effect of 14 times may be obtained wheh this is mounted to a master lens of zoom ratio 10 times. On the other hand the refractive powers of respective elements are made as weak as possible to maintain aberrations well.
COPYRIGHT: (C)1980,JPO&Japio
JP10467678A 1978-08-28 1978-08-28 Teleconverter Granted JPS5532046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10467678A JPS5532046A (en) 1978-08-28 1978-08-28 Teleconverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10467678A JPS5532046A (en) 1978-08-28 1978-08-28 Teleconverter

Publications (2)

Publication Number Publication Date
JPS5532046A true JPS5532046A (en) 1980-03-06
JPS6112250B2 JPS6112250B2 (en) 1986-04-07

Family

ID=14387065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10467678A Granted JPS5532046A (en) 1978-08-28 1978-08-28 Teleconverter

Country Status (1)

Country Link
JP (1) JPS5532046A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865434A (en) * 1984-10-01 1989-09-12 Canon Kabushiki Kaisha Zoom lens capable of selecting a focal length beyond a standard focal length range
US6449100B2 (en) 2000-03-27 2002-09-10 Fuji Photo Optical Co., Ltd. Teleconverter lens
US7170689B2 (en) 2004-05-21 2007-01-30 Canon Kabushiki Kaisha Front converter lens
US8873154B2 (en) 2012-02-09 2014-10-28 Canon Kabushiki Kaisha Tele-side converter lens and image pickup apparatus including the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865434A (en) * 1984-10-01 1989-09-12 Canon Kabushiki Kaisha Zoom lens capable of selecting a focal length beyond a standard focal length range
US6449100B2 (en) 2000-03-27 2002-09-10 Fuji Photo Optical Co., Ltd. Teleconverter lens
US7170689B2 (en) 2004-05-21 2007-01-30 Canon Kabushiki Kaisha Front converter lens
US8873154B2 (en) 2012-02-09 2014-10-28 Canon Kabushiki Kaisha Tele-side converter lens and image pickup apparatus including the same

Also Published As

Publication number Publication date
JPS6112250B2 (en) 1986-04-07

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