Telephoto zoom lens system and photographing apparatus having the same
US8824057B2 · kind B2 · utility
2Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 2013 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Mar 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/173
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A telephoto zoom lens system includes a first lens group having a positive focal length, a second lens group having a negative focal length, a third lens group having a positive or negative focal length, a fourth lens group having a positive focal length, and a fifth lens group for performing hand shake compensation by allowing a portion of the fifth lens group to move perpendicularly to the optical axis. During zooming, the first and fifth lens groups are fixed and the second, third, and fourth lens groups move, and the third or fourth lens group is a focusing lens group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.