Optoelectronic surveillance system, comprising an acquisition unit including at least one sensor mounted behind a zoom having a group of movable lenses at the front and a group of fixed lenses at the rear, defining at least one first space in convergent rays, and a control unit connected to the acquisition unit and to a rotary optical element arranged so as to rotate about a first axis and secured to a drive member controlled by the control unit in order to modify a field perceived by the sensor independently of a movement of the acquisition unit about the first axis. The optical element is a first transparent plate mounted in the first space so as to rotate about the first axis, and the drive member is arranged so as to rotate the first plate in two opposite directions.