A zoom lens assembly includes a first barrel including a first lens group; a second barrel including a second lens group that is aligned with respect to an optical axis of the first lens group, the second barrel disposed in front of the first lens group so as to be position-adjustable along the optical axis with respect to the first barrel; and a first ray shielding plate disposed in front of the first barrel and between the first barrel and the second barrel, and whose position is varied to be close to a center of the optical axis or to be distant from the center of the optical axis so as to block a portion of incident light that enters into the first barrel according to relative positions of the first barrel and the second barrel.