| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact, bright, and high-quality image capturing standard zoom lens with a variable magnification ratio of about 3, which features standard zooming with a wobbling function that is also applicable to video recording. <P>SOLUTION: A zoom lens comprises a first lens group having negative refractive power, a second lens group having positive refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having positive refractive power, located in order from the object side. The zoom lens changes magnification by varying the distance between each pair of lens group. When zooming from the wide angle end to the telephoto end, the distance between the first lens group and the second lens group is narrowed while the distance between the second lens group and the third lens group is varied, and the distance between the third lens group and the fourth lens group and the distance between the fourth lens group and the fifth lens group are both widened. <P>COPYRIGHT: (C)2013,JPO&INPIT |
