PURPOSE: A movable zoom lens assembly is provided to effectively shield harmful rays inputted from outside even when the relative position of lens are changed. CONSTITUTION: A zoom lens assembly comprises a first barrel(10), a second barrel, and a first light shield board(30). The first barrel comprises a first optic group. The second barrel is arranged to be moved in relative to the first barrel. The position of the first light shield board is varied to shield a part of incident light to the first barrel.
