| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a zoom lens having a high zoom ratio and excellent optical performance over the entire zoom range from the wide angle end to the telephoto end, and easily performing quiet and quick focusing.SOLUTION: A zoom lens includes, in order from an object side to an image side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a rear group having two or more lens groups, and the distances between adjacent lens groups are changed for at least either of zooming or focusing. The rear group includes a focus lens group having negative refractive power. The refractive power of each lens group, and the moving locus of each lens group when focusing or zooming are appropriately set.</p> |
