| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a zoom lens which has small aberration variation in focusing and obtains high optical performance over the entire object distance range. <P>SOLUTION: In a zoom lens where plural lens groups move in focusing, the zoom lens includes an N lens group having a negative refractive power and a P lens group having a positive refractive power arranged on an image side of the N lens group. For focusing from infinity to a closest distance, the N lens group moves towards the image side and the P lens group moves towards the object side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
