JPS5229521B2 - - Google Patents
Info
- Publication number
- JPS5229521B2 JPS5229521B2 JP6645172A JP6645172A JPS5229521B2 JP S5229521 B2 JPS5229521 B2 JP S5229521B2 JP 6645172 A JP6645172 A JP 6645172A JP 6645172 A JP6645172 A JP 6645172A JP S5229521 B2 JPS5229521 B2 JP S5229521B2
- Authority
- JP
- Japan
- 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
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645172A JPS5229521B2 (enExample) | 1972-07-03 | 1972-07-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6645172A JPS5229521B2 (enExample) | 1972-07-03 | 1972-07-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4923912A JPS4923912A (enExample) | 1974-03-02 |
| JPS5229521B2 true JPS5229521B2 (enExample) | 1977-08-02 |
Family
ID=13316135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6645172A Expired JPS5229521B2 (enExample) | 1972-07-03 | 1972-07-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5229521B2 (enExample) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5334539A (en) * | 1976-09-13 | 1978-03-31 | Tokina Optical | Wide angle high zoom ratio zoom system |
| JPS5426754A (en) * | 1977-07-30 | 1979-02-28 | Asahi Optical Co Ltd | Zoom lens having small distorted aberration |
| JPS54151027A (en) * | 1978-05-19 | 1979-11-27 | Sigma Kk | Small wide angle zoom lens |
| JPS5532037A (en) * | 1978-08-29 | 1980-03-06 | Nippon Kogaku Kk <Nikon> | Zoom lens system for near distance |
| JPS5535323A (en) * | 1978-09-04 | 1980-03-12 | Sigma:Kk | Super wide-angle zoom lens |
| JPS5590930A (en) * | 1978-12-29 | 1980-07-10 | Nippon Kogaku Kk <Nikon> | 4-group constitution lens |
| JPS5833531B2 (ja) * | 1980-06-05 | 1983-07-20 | コニカ株式会社 | 高変倍率ズ−ムレンズ |
| JPS575023A (en) * | 1980-06-11 | 1982-01-11 | Minolta Camera Co Ltd | Zoom lens system |
| JPS5711315A (en) * | 1980-06-24 | 1982-01-21 | Konishiroku Photo Ind Co Ltd | Zoom lens with highly variable magnification preceding negative groups |
| JP2778232B2 (ja) * | 1990-09-07 | 1998-07-23 | キヤノン株式会社 | 広角ズームレンズ |
| JP2808905B2 (ja) * | 1991-02-19 | 1998-10-08 | キヤノン株式会社 | ズームレンズ |
| US5576890A (en) * | 1992-02-28 | 1996-11-19 | Canon Kabushiki Kaisha | Zoom lens |
| US5691851A (en) * | 1993-07-14 | 1997-11-25 | Canon Kabushiki Kaisha | Zoom lens |
| US5710669A (en) * | 1994-03-17 | 1998-01-20 | Canon Kabushiki Kaisha | Wide-angle zoom lens |
| JP3576679B2 (ja) * | 1996-01-25 | 2004-10-13 | キヤノン株式会社 | ズームレンズ |
| US6191896B1 (en) | 1997-09-04 | 2001-02-20 | Canon Kabushiki Kaisha | Zoom lens and optical apparatus having the same |
| US6285509B1 (en) | 1997-12-25 | 2001-09-04 | Canon Kabushiki Kaisha | Zoom lens and display apparatus having the same |
-
1972
- 1972-07-03 JP JP6645172A patent/JPS5229521B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4923912A (enExample) | 1974-03-02 |