Zoom lens, image sensing optical device and digital appliance

摘要

In a zoom lens, at least a first group of negative optical power and a second group of positive optical power are included from an object side, when zooming is performed from a wide-angle end to a telephoto end, a distance between the first and the second groups is reduced and an aperture is moved together with the second group. The first group is formed with a front group composed of only negative lenses and a rear group which is composed of two lenses, a positive and a negative from the object side and which has a positive optical power as a whole and the zoom lens satisfies a conditional formula: 0.06

主权项

1. A zoom lens that performs zooming by moving a plurality of lens groups along an optical axis to change a distance between the plurality of lens groups,
wherein at least a first group of negative optical power and a second group of positive optical power are included between an object to be imaged by the zoom lens, and an image surface, when zooming is performed from a wide-angle end to a telephoto end, a distance between the first group and the second group is reduced, and an aperture is moved together with the second group, the first group is formed, from an object side of the second group, with a front group comprising only negative lenses and a rear group comprising two lenses, a positive lens and a negative lens, from the object side of the second group, and which has a positive optical power as a whole and
conditional formula (1) below is satisfied:
0.06T1 is a distance on an optical axis between the front group and the rear group in the first group, andLmax is a maximum total length of the zoom lens in zooming.