ZOOM LENS AND IMAGING APPARATUS

摘要

A zoom lens includes, in order from an object side to an image side: a first lens group having a positive refractive power; a second lens group having a negative refractive power; a third lens group having a positive refractive power; a fourth lens group having a negative refractive power; and a fifth lens group having a negative refractive power. During zooming from a wide-angle end state to a telephoto end state, air spacing between the first and second lens groups increases, air spacing between the second and third lens groups decreases, spacing between the third and fourth lens groups changes, and spacing between the fourth and fifth lens groups changes. Thus, all the lens groups are moved in an optical axis direction. The zoom lens satisfies the following Conditional Expression (1).;1.0<β5w≦4.0  (1);Here, β5w is a lateral magnification of the fifth lens group at a wide-angle end.

主权项

1. A zoom lens comprising, in order from an object side to an image side:
a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; a third lens group that has a positive refractive power; a fourth lens group that has a negative refractive power; and a fifth lens group that has a negative refractive power,
wherein during zooming from a wide-angle end state in which a focal length is shortest to a telephoto end state in which a focal length is longest, all the lens groups are moved in an optical axis direction such that air spacing between the first lens group and the second lens group increases, air spacing between the second lens group and the third lens group decreases, spacing between the third lens group and the fourth lens group changes, and spacing between the fourth lens group and the fifth lens group changes, andwherein the following Conditional Expression (1) is satisfied.
1.0<β5w≦4.0,  (1)where β5w is a lateral magnification of the fifth lens group at a wide-angle end.