| 摘要 |
A zoom lens system, in order from the object side to the image side, comprises: a first lens unit having positive optical power; a second lens unit that includes a reflective optical element having a reflecting surface for bending object light and that has negative optical power; and a subsequent lens unit including more than one lens unit having positive optical power, and that satisfies the condition: -5.70<F<SUB>1</SUB>/f<SUB>2</SUB><-2.00 (Z=F<SUB>T</SUB>/f<SUB>W</SUB>>5.0, f<SUB>1 </SUB>is the composite focal length of the first lens unit, f<SUB>2 </SUB>is the composite focal length of the second lens unit, f<SUB>W </SUB>is the focal length of the entire zoom lens system at a wide-angle limit, f<SUB>T </SUB>is the focal length of the entire zoom lens system at a telephoto limit, Z is the magnification variation ratio), and is held in a compact lens barrel.
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