JPH0441804B2 - - Google Patents
Info
- Publication number
- JPH0441804B2 JPH0441804B2 JP58137375A JP13737583A JPH0441804B2 JP H0441804 B2 JPH0441804 B2 JP H0441804B2 JP 58137375 A JP58137375 A JP 58137375A JP 13737583 A JP13737583 A JP 13737583A JP H0441804 B2 JPH0441804 B2 JP H0441804B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- rfc
- objective lens
- focusing
- distance
- 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.)
- Expired
Links
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 10
- 230000005499 meniscus Effects 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 230000004075 alteration Effects 0.000 description 34
- 238000010586 diagram Methods 0.000 description 19
- 230000011514 reflex Effects 0.000 description 11
- 238000003384 imaging method Methods 0.000 description 9
- 201000009310 astigmatism Diseases 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- G02B15/142—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 two groups only
- G02B15/1421—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 two groups only the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58137375A JPS6028614A (ja) | 1983-07-27 | 1983-07-27 | リアフオ−カスコンバ−ジヨンレンズ |
| US06/632,103 US4655558A (en) | 1983-07-27 | 1984-07-18 | Rear focus conversion lens apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58137375A JPS6028614A (ja) | 1983-07-27 | 1983-07-27 | リアフオ−カスコンバ−ジヨンレンズ |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6028614A JPS6028614A (ja) | 1985-02-13 |
| JPH0441804B2 true JPH0441804B2 (ru) | 1992-07-09 |
Family
ID=15197212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58137375A Granted JPS6028614A (ja) | 1983-07-27 | 1983-07-27 | リアフオ−カスコンバ−ジヨンレンズ |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6028614A (ru) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6265768B2 (ja) * | 2014-02-10 | 2018-01-24 | オリンパス株式会社 | テレコンバーター及びそれを備えた撮像システム |
| GB2583820B (en) * | 2019-02-27 | 2022-03-02 | Canon Kk | Converter lens, interchangeable lens, and image capturing apparatus |
-
1983
- 1983-07-27 JP JP58137375A patent/JPS6028614A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6028614A (ja) | 1985-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |