| 摘要 |
A zoom lens system is provided that includes a compactly constructed focusing lens unit and that has a suppressed change in the image magnification at the time of movement of a focusing lens unit. The zoom lens system according to the present invention, in order from an object side to an image side, comprises: a first lens unit having positive optical power; a second lens unit having negative optical power; and at least three subsequent lens units, the at least three subsequent lens units, in order from an object side to an image side, include: a lens unit A having negative optical power; and a lens unit B having positive optical power and arranged on the image side of the lens unit A, at the time of zooming, all lens units move in a direction along the optical axis so that intervals between the lens units vary, and at the time of focusing, the lens unit A moves in a direction along the optical axis.
|
