| 摘要 |
<p>This specification discloses a zoom lens which has, in succession from the object side, a first lens unit (F) of positive refractive power, a second lens unit (V) having negative refractive power and movable during a focal length change, a third lens unit (C) for correcting the changing of an image plane resulting from the movement of the second lens unit (V), and a fixed fourth lens unit (R) having positive refractive power, and in which an aspherical surface of a predetermined shape for well correcting spherical aberration and distortion resulting from a focal length change is provided on a predetermined lens surface in the first lens unit (F). <IMAGE></p> |
