Zoom lens, optical apparatus having same, and method of manufacturing zoom lens
US8736968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2009 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Aug 9, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B13/34
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a zoom lens which can shift images using a movable optical system so as to have components orthogonal to the optical axis, and can correct hand motion blur, and minimizes the deterioration of performance while attempting higher variable power. This zoom lens has, in order from an object, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a third lens group G3 having positive refractive power, a fourth lens group G4 having negative refractive power, and a fifth lens group G5 having positive refractive power, and at least a part of the fourth lens group G4 can move so as to have components orthogonal to the optical axis, and a distance between each lens group is changed upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expression is satisfied, 0.01<f5/ft<0.30, where f5 denotes a focal length of the fifth lens group, and ft denotes a focal length of the zoom lens upon focusing on infinity in the telephoto end state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.