| 摘要 |
The zoom lens includes, in order from an object side to an image side, first, second and third lens units respectively having positive, negative and positive refractive powers, and a rear lens group. The second lens unit and a most-object side lens unit of the rear lens group are moved during zooming, and the first lens unit is not moved for zooming. The first lens unit includes one negative lens and three positive lenses. Conditions of 5.0<f1/|f2|<7.0 and−0.2<(R1+R2)/(R1−R2)<1.1 are satisfied where f1 represents a focal length of the first lens unit, f2 represents a focal length of the second lens unit, and R1 and R2 respectively represent curvature radii of an object side lens surface and an image side lens surface of the negative lens included in the first lens unit. |
