| 摘要 |
Provided is a zoom lens system which includes a plurality of lens units separated from one another at intervals changed during at least one of zooming and focusing and an aperture stop. The plurality of lens units include a movable lens unit for displacing an image formed by the zoom lens system within a plane perpendicular to an optical axis. The movable lens unit includes a first lens subunit located on an object side of the aperture stop and a second lens subunit located on an image side of the aperture stop. When the image formed by the zoom lens system is displaced within the plane perpendicular to the optical axis, the aperture stop is held and the first lens subunit and the second lens subunit are moved to have a component in a direction orthogonal to the optical axis.
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