JPS5567717A - Focusing method which prevents change in angle of view - Google Patents
Focusing method which prevents change in angle of viewInfo
- Publication number
- JPS5567717A JPS5567717A JP14180778A JP14180778A JPS5567717A JP S5567717 A JPS5567717 A JP S5567717A JP 14180778 A JP14180778 A JP 14180778A JP 14180778 A JP14180778 A JP 14180778A JP S5567717 A JPS5567717 A JP S5567717A
- Authority
- JP
- Japan
- Prior art keywords
- angle
- ray
- focusing
- view
- change
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/40—Optical focusing aids
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1445—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative
- G02B15/144511—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being negative arranged -+-+
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14180778A JPS5567717A (en) | 1978-11-17 | 1978-11-17 | Focusing method which prevents change in angle of view |
US06/093,989 US4278331A (en) | 1978-11-17 | 1979-11-14 | Photographic objective which prevents variation in angular field of view during focusing |
DE19792946379 DE2946379A1 (de) | 1978-11-17 | 1979-11-16 | Photographisches objektiv mit waehrend der scharfeinstellung unveraendertem bildwinkel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14180778A JPS5567717A (en) | 1978-11-17 | 1978-11-17 | Focusing method which prevents change in angle of view |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5567717A true JPS5567717A (en) | 1980-05-22 |
JPS6145808B2 JPS6145808B2 (US20100223739A1-20100909-C00005.png) | 1986-10-09 |
Family
ID=15300577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14180778A Granted JPS5567717A (en) | 1978-11-17 | 1978-11-17 | Focusing method which prevents change in angle of view |
Country Status (3)
Country | Link |
---|---|
US (1) | US4278331A (US20100223739A1-20100909-C00005.png) |
JP (1) | JPS5567717A (US20100223739A1-20100909-C00005.png) |
DE (1) | DE2946379A1 (US20100223739A1-20100909-C00005.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0281014A (ja) * | 1988-09-17 | 1990-03-22 | Nikon Corp | 近距離撮影可能な望遠レンズ |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2950951A1 (de) * | 1978-12-25 | 1980-07-10 | Canon Kk | Photographisches objektiv mit stabilisierung gegen eine bildwinkelaenderung waehrend des fokussierens |
JPS55161207A (en) * | 1979-06-04 | 1980-12-15 | Canon Inc | Zoom lens of small size |
JPS5782811A (en) * | 1980-11-11 | 1982-05-24 | Canon Inc | Zoom lens |
JPS62155804A (ja) * | 1985-12-27 | 1987-07-10 | アキレス株式会社 | 靴用防菌防黴性胛材 |
JPH0197708U (US20100223739A1-20100909-C00005.png) * | 1987-12-21 | 1989-06-29 | ||
JPH0197701U (US20100223739A1-20100909-C00005.png) * | 1987-12-21 | 1989-06-29 | ||
US8508864B2 (en) * | 2008-08-25 | 2013-08-13 | Acm Projektentwicklung Gmbh | Objective lens system |
US7880978B2 (en) * | 2008-08-25 | 2011-02-01 | Acm Projektentwicklung Gmbh | Objective lens system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1214341A (en) * | 1968-06-06 | 1970-12-02 | Rank Organisation Ltd | Improvements in or relating to objectives of variable focal length |
US3705759A (en) * | 1970-05-20 | 1972-12-12 | Rank Organisation Ltd | Optical objective of variable focal length |
JPS594686B2 (ja) * | 1975-12-04 | 1984-01-31 | キヤノン株式会社 | カヘンシヨウテンキヨリレンズ |
JPS594687B2 (ja) * | 1976-01-28 | 1984-01-31 | キヤノン株式会社 | 近距離合焦性能の良好なズ−ムレンズ |
JPS594688B2 (ja) * | 1976-03-11 | 1984-01-31 | キヤノン株式会社 | ズ−ムレンズ |
-
1978
- 1978-11-17 JP JP14180778A patent/JPS5567717A/ja active Granted
-
1979
- 1979-11-14 US US06/093,989 patent/US4278331A/en not_active Expired - Lifetime
- 1979-11-16 DE DE19792946379 patent/DE2946379A1/de not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0281014A (ja) * | 1988-09-17 | 1990-03-22 | Nikon Corp | 近距離撮影可能な望遠レンズ |
Also Published As
Publication number | Publication date |
---|---|
US4278331A (en) | 1981-07-14 |
DE2946379A1 (de) | 1980-05-29 |
JPS6145808B2 (US20100223739A1-20100909-C00005.png) | 1986-10-09 |
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