| 摘要 |
A zoom lens has, in order from the object side thereof, a positive first lens unit G1, a negative second lens unit G2, a positive third lens unit G3, a fourth lens unit G4, and an aperture stop S disposed closer to the image side than the second lens unit and closer to the object side than the lens surface closest to the image side in the third lens unit, wherein during zooming from the wide angle end to the telephoto end, the distance between the first lens unit G1 and the second lens unit G2 is larger at the telephoto end than at the wide angle end, the distance between the second lens unit G2 and the third lens unit G3 is smaller at the telephoto end than at the wide angle end, the distance between the third lens unit G3 and the fourth lens unit G4 changes, and the first lens unit G1, the third lens unit G3 and the aperture stop S move in such a way that they are located closer to the object side at the telephoto end than at the wide angle end. The zoom lens satisfies prescribed conditional expressions.
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