| 摘要 |
A zoom lens includes a negative lens unit having a negative refractive power, at least one positive lens unit having a positive refractive power, an intermediate lens unit including a stop, and at least one reduction side lens unit, in order from a magnification conjugate side to a reduction conjugate side, at least two magnification side movable lens units in the negative lens unit and the at least one positive lens unit, and at least one reduction side movable lens unit in the at least one reduction side lens unit are moved during zooming, and conditions of 0.9<(XT·&bgr;Tb·&phgr;W)/(XW·&bgr;Wb·&phgr;T)<1.1, 0.9<&phgr;W/&phgr;T<1.1, 0.8<(&bgr;TS·&bgr;Tb)/(&bgr;WS·&bgr;Wb)<1.2, and 1.4<fT/fW are satisfied.
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