Patent ID: 9172882
Filing Date: 2015-10-27
Classification: G02B,H04N

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; and subsequent lens units, wherein the first lens unit is composed of three or four lens elements, the zoom lens system being provided with: an aperture diaphragm; an image blur compensating lens unit composed of one or more lens elements, which moves in a direction perpendicular to an optical axis to optically compensate image blur; and a focusing lens unit composed of one or more lens elements, which moves along the optical axis in focusing from an infinity in-focus condition to a close-object in-focus condition, wherein the subsequent lens units include the aperture diaphragm, the image blur compensating lens unit, and the focusing lens unit, the image blur compensating lens unit and the focusing lens unit are provided on the image side relative to the aperture diaphragm, and the following conditions (1) and (2) are satisfied: where Y f f ω F D D