Zoom lens and image pickup apparatus
US7286300B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2006 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Apr 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/1461
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A zoom lens is disclosed which has a macro mode wherein the magnifying power is higher than 0.5. The zoom lens includes a first positive lens group, a second negative lens group movable upon power variation, and a plurality of movable lens groups cooperable with the second group to form a macro lens group, disposed in order from an object side. The movable lens groups include a single focusing group, and an additional negative lens group disposed further on the image side. The zoom lens has a macro mode in which it can be focused at a shorter distance than an ordinary region by moving the macro lens group integrally from a telephoto end position toward the object side while the first lens group is fixed at the telephotograph end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.