| 摘要 |
A zoom lens including four lens units having positive, negative, positive, and positive refractive power in order from an object side to an image side thereof, wherein the distance between the adjacent lens units changes when zooming: wherein the third lens unit includes, in order from the object side to the image side, a first lens subunit having negative refractive power and a second lens subunit having positive refractive power. The zoom lens is configured to displace an image formed by the zoom lens in a direction perpendicular to its optical axis by moving the second lens subunit so as to have a component perpendicular to the optical axis, wherein the curvature radius of a surface, closest to the object, of the first lens subunit and the curvature radius of a surface second closest to the object, of the first lens subunit are set at appropriate values. |
