| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens system having high accuracy at varying power and at focusing. SOLUTION: The zoom lens system 5 includes a plurality of lens groups G1 to G7, and some groups G2 and G3 of the plurality of lens groups are synchronously shifted as one group at varying the power, and only the lens group G3 is shifted at the time of focusing. Some of the lens groups contributing to the variable power are only shifted at focusing, then, both the power varying accuracy and the focusing accuracy are attained. COPYRIGHT: (C)2006,JPO&NCIPI
|
