Zoom lens and photographing apparatus including the same
US9341825B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2013 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Dec 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/144515
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens and a photographing apparatus including the same. The zoom lens includes, in an order from an object side: a first lens group having negative refractive power; a second lens group having positive refractive power; a third lens group having positive refractive power; and a fourth lens group having an iris on a side of the fourth lens group closest to the object side and positive refractive power, wherein, while zooming from a wide angle position to a telephoto position, the first through fourth lens groups are moved such that the interval between the first and second lens groups increases, the interval between the second and third lens groups decreases, and the interval between the third and fourth lens groups decreases, and focusing is performed by moving the third lens group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.