JPS5532046A - Teleconverter - Google Patents
TeleconverterInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1978
- 1978-08-28 JP JP10467678A patent/JPS5532046A/en active Granted
Cited By (4)
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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