| 摘要 |
<p>A zoom lens includes, in order from object to image sides, first and second lens units (L1 and L2) having positive and negative refractive power, respectively, and a rear lens group (Lr) including a lens unit IS having negative refractive power and movable in a direction having a component perpendicular to the optical axis so as to displace the imaging position, and a lens unit R_IS having positive refractive power and arranged on the image side of the lens unit IS. The distance between the lens units IS and R_IS is variable during zooming. The following conditions are satisfied:
0.05 < fIS/fTI < 0.18 (1)
2.0 < fl/fR_IS < 4.5 (2)
where fIS, fT, f1, and fR_IS are focal lengths of the lens unit IS, entire zoom lens at telephoto end, first lens unit, and lens unit R_IS, respectively.</p> |
