BE708123A - - Google Patents
Info
- Publication number
- BE708123A BE708123A BE708123DA BE708123A BE 708123 A BE708123 A BE 708123A BE 708123D A BE708123D A BE 708123DA BE 708123 A BE708123 A BE 708123A
- Authority
- BE
- Belgium
Links
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
- G02B15/145—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 five groups only
- G02B15/1455—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 five groups only the first group being negative
- G02B15/145511—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 five groups only the first group being negative arranged -+-+-
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Telescopes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR92879A FR1520491A (fr) | 1967-01-27 | 1967-01-27 | Objectif de prise de vues cinématographiques à focale variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE708123A true BE708123A (pl) | 1968-05-02 |
Family
ID=8624506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE708123D BE708123A (pl) | 1967-01-27 | 1967-12-18 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3532415A (pl) |
| BE (1) | BE708123A (pl) |
| CH (1) | CH469993A (pl) |
| DE (1) | DE1622994B1 (pl) |
| FR (1) | FR1520491A (pl) |
| GB (1) | GB1213491A (pl) |
| NL (1) | NL6800893A (pl) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2253281B (en) * | 1991-02-15 | 1994-05-25 | Asahi Optical Co Ltd | Zoom lens |
| US5416639A (en) * | 1991-06-29 | 1995-05-16 | Olympus Optical Co., Ltd. | Zoom lens system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3192829A (en) * | 1961-06-16 | 1965-07-06 | Yamaji Keizo | Varifocal lens system of wide varifocal range |
| FR1336300A (fr) * | 1962-07-11 | 1963-08-30 | Soc Optique Mec Haute Prec | Système optique à distance focale variable |
-
1967
- 1967-01-27 FR FR92879A patent/FR1520491A/fr not_active Expired
- 1967-12-18 BE BE708123D patent/BE708123A/xx unknown
-
1968
- 1968-01-08 CH CH18868A patent/CH469993A/fr unknown
- 1968-01-16 US US698329A patent/US3532415A/en not_active Expired - Lifetime
- 1968-01-19 NL NL6800893A patent/NL6800893A/xx unknown
- 1968-01-22 GB GB3334/68A patent/GB1213491A/en not_active Expired
- 1968-01-27 DE DE1968S0113898 patent/DE1622994B1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3532415A (en) | 1970-10-06 |
| NL6800893A (pl) | 1968-07-29 |
| DE1622994B1 (de) | 1970-11-12 |
| GB1213491A (en) | 1970-11-25 |
| CH469993A (fr) | 1969-03-15 |
| FR1520491A (fr) | 1968-04-12 |