An actuator assembly for an optical path folding element, comprising - an actuator assembly housing having a first aperture and a second aperture, wherein the first aperture is for passing light rays of a field of view, and the second aperture is for passing light rays folded by the optical path folding element, wherein the actuator assembly housing is configured to receive an end portion of an optical actuator within the second aperture, and wherein the optical actuator comprises at least one lens located within the end portion; and - a first sub-assembly, for mounting thereon the optical path folding element, and which is configured to provide movement to the optical path folding element, characterized in that the first sub-assembly is configured to provide movement by being rotatably mounted, relative to the actuator assembly housing, about an axis of the second aperture, wherein the first sub-assembly is rotatably mounted about the axis of the second aperture by a first sliding mechanism located in a region between an interface zone of the first sub-assembly and an interface zone of the actuator assembly housing, the interface zone of the first sub-assembly and the interface zone of the actuator assembly housing providing a support structure for the first sliding mechanism, and wherein the said region is located outward of the second aperture and thus in a direction away from the second aperture such that when the optical actuator is received, the at least one lens of the end portion of the optical actuator is in a same plane or inwardly of the first sliding mechanism. - an actuator assembly housing having a first aperture and a second aperture, wherein the first aperture is for passing light rays of a field of view, and the second aperture is for passing light rays folded by the optical path folding element, wherein the actuator assembly housing is configured to receive an end portion of an optical actuator within the second aperture, and wherein the optical actuator comprises at least one lens located within the end portion; and wherein the first aperture is for passing light rays of a field of view, and the second aperture is for passing light rays folded by the optical path folding element, wherein the actuator assembly housing is configured to receive an end portion of an optical actuator within the second aperture, and wherein the optical actuator comprises at least one lens located within the end portion; and - a first sub-assembly, for mounting thereon the optical path folding element, and which is configured to provide movement to the optical path folding element, characterized in that the first sub-assembly is configured to provide movement by being rotatably mounted, relative to the actuator assembly housing, about an axis of the second aperture, wherein the first sub-assembly is rotatably mounted about the axis of the second aperture by a first sliding mechanism located in a region between an interface zone of the first sub-assembly and an interface zone of the actuator assembly housing, the interface zone of the first sub-assembly and the interface zone of the actuator assembly housing providing a support structure for the first sliding mechanism, and wherein the said region is located outward of the second aperture and thus in a direction away from the second aperture such that when the optical actuator is received, the at least one lens of the end portion of the optical actuator is in a same plane or inwardly of the first sliding mechanism. characterized in that the first sub-assembly is configured to provide movement by being rotatably mounted, relative to the actuator assembly housing, about an axis of the second aperture, wherein the first sub-assembly is rotatably mounted about the axis of the second aperture by a first sliding mechanism located in a region between an interface zone of the first sub-assembly and an interface zone of the actuator assembly housing, the interface zone of the first sub-assembly and the interface zone of the actuator assembly housing providing a support structure for the first sliding mechanism, and wherein the said region is located outward of the second aperture and thus in a direction away from the second aperture such that when the optical actuator is received, the at least one lens of the end portion of the optical actuator is in a same plane or inwardly of the first sliding mechanism.