ZOOM LENS AND ELECTRONIC APPARATUS INCLUDING THE SAME

摘要

A zoom lens includes: in an 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; and a fourth lens group having a positive refractive power, wherein, when zooming is performed from a wide angle position to a telephoto position, the first through fourth lens groups move, and the first lens group includes a first negative lens and a second positive lens from the object side. The zoom lens may be part of an electronic apparatus, such as a photographing apparatus.

主权项

1. A zoom lens comprising, in an 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; and a fourth lens group having a positive refractive power, wherein, when zooming is performed from a wide angle position to a telephoto position, the first through fourth lens groups move, and wherein the first lens group comprises a first negative lens and a second positive lens from the object side, the second lens group comprises a third negative lens, a fourth negative lens, and a fifth positive lens, and the third negative lens comprises a concave surface at an object side thereof, wherein
(D/Z)/fw<0.32(Dt/Z)/fw<1.30