Zoom lens and image pickup apparatus including the same
US9715090B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2015 |
| Grant date | Jul 25, 2017 |
| Priority date | — |
| Expiry date | Feb 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/69
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A zoom lens includes: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a positive refractive power; and a fifth lens unit having a positive refractive power or a negative refractive power, in which the first lens unit and the fifth lens unit do not move for zooming, and the second lens unit and the fourth lens unit move during zooming, in which a focal length fw of the zoom lens at a wide angle end, a focal length f2 of the second lens unit, and a focal length of a positive lens, which is included in the second lens unit are suitably set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.