| 摘要 |
Provided is a zoom lens, including, in order from an object side to an image side: a first lens unit having a positive refractive power which does not move; a second lens unit having a negative refractive power which moves during zooming and focusing; a third lens unit having the negative refractive power which moves during zooming; a fourth lens unit having one of the negative refractive power and the positive refractive power; and a fifth lens unit having the positive refractive power, in which a lateral magnification (&bgr;2w) of the second lens unit at a wide angle end when an object distance is infinity, and a ratio of a focal length (f2) of the second lens unit and a focal length (f3) of the third lens unit are appropriately set. |
