Patent ID: 11933954
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC G

Claim 11:
12. A zoom lens system comprising, as a plurality of lens groups:
a first lens group having positive power;
a second lens group having negative power;
a third lens group having positive power;
a fourth lens group having positive power;
a fifth lens group having negative power; and
a following lens group,
the first, second, third, fourth, and fifth lens groups and the following lens group being arranged in this order such that the first lens group is located closer to an object than any other lens group and that the following lens group is located closer to an image than any other lens group, wherein
while the zoom lens system is zooming, intervals between the plurality of lens groups change,
while the zoom lens system is focusing from an infinity focus point through a shortest shooting range, the fifth lens group and a negative lens group included in the following lens group move,
the zoom lens system satisfies the following Inequality (1):

vd_pG3G4>75  (1), where vd_pG3G4 is a maximum value of abbe numbers of one or more positive lenses included in the third lens group and the fourth lens group, and
while the zoom lens system is focusing from an infinity focus point through a shortest shooting range:
(a) the fifth lens group having negative power moves toward the image, and
the following lens group includes a sixth lens group having negative power, the sixth lens group being adjacent to the fifth lens group and located closer to the image than the fifth lens group, the sixth lens group moving toward the object, or
(b) the fifth lens group having negative power moves toward the image, and
a lens group having negative power and located closer to the image than any other lens group in the zoom lens system moves toward the image.