Zoom lens system and electronic image pickup apparatus using the same
US7729058B2 · kind B2 · utility
2Cited by
4References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Nov 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/143507
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens system includes, in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. During zooming from a wide-angle end to a telephoto end, a space between the first lens unit and the second lens unit narrows, at least the second lens unit moves only toward the object side, and the third lens unit is constituted of one positive lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.