| 摘要 |
A zoom lens system has the first to fifth lens units from the object side. Refractive powers of the first to fifth lens units are positive, negative, negative, positive, negative, respectively. During zooming, the distances between the lens units are varied. Image blur compensation is made by parallel decentering the second lens unit. The second lens unit includes a first lens unit and a rear lens unit, either of which can be moved vertically to the optical axis to compensate for image blur. The distance between the front and rear lens units is fixed during a zooming mode.
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