| 摘要 |
<p>A zoom lens to form an image of an object with variable magnification, is provided with a first lens group having a positive refracting power, and a second lens group positioned closer to the image than the first lens group and having a negative refracting power. When the magnification is changed, a distance between the first lens group and the second lens group is changed. The first lens group comprises a 1-1 lens, a 1-2 lens and a 1-3 lens aligned in this order from the object. The zoom lens comprises at least two plastic lenses. <IMAGE></p> |
