Patent ID: 8576492
Filing Date: 2013-11-05
Classification: G02B

Abstract:
1. A zoom lens system, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; a third lens unit having positive optical power; and one or more subsequent lens units, wherein in zooming from a wide-angle limit to a telephoto limit at the time of image taking, the first lens unit, the second lens unit, and the third lens unit are moved along an optical axis to perform magnification change, a lens unit α which is one of the subsequent lens units does not move along the optical axis at the time of the zooming, but moves along the optical axis at the time of transition from an imaging state to an accommodated state, and the following conditions (1), (2-1) and (a) are satisfied: where, L D f f f