Zoom lens and a camera providing the same
US7151637B2 · kind B2 · utility
6Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2004 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Mar 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/145121
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system comprises, in order from an object side, positive, negative, positive, negative, and positive refractive power lens groups, and while changing the magnification, the distance between the first lens group and the second lens group increases, the distance between the second lens group and the third lens group decreases, the distance between the third lens group and the fifth lens group increases, and the second lens group moves more towards the object side at the telephoto end than the wide-angle end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.