A camera apparatus comprising: a support structure; a camera unit comprising an image sensor and a lens system for focussing an image on the image sensor, the camera unit being supported on the support structure in a manner allowing the camera unit to tilt around two axes that are perpendicular to each other and to the optical axis of the lens system; and an SMA actuator system comprising two SMA actuator subsystems each comprising two SMA actuators disposed on opposite sides of the camera unit, each SMA actuator comprising a piece of SMA wire connected between the camera unit and the support structure, each SMA actuator subsystem being arranged, on differential contraction of the actuators thereof, to drive rotation of the camera unit around a respective one of said two axes that are perpendicular to each other and to the optical axis of the lens system, characterised in that: each SMA actuator comprises a piece of SMA wire connected at both ends to one of the camera unit and the support structure and intermediate its ends hooked over a hook on the other of the camera unit and the support structure, the SMA actuator system supporting the camera unit on the support structure in said manner allowing the camera unit to tilt around said two axes that are perpendicular to each other and to the optical axis of the lens system; and the respective SMA actuator subsystems are arranged, on contraction of the actuators thereof, to drive displacement of the camera unit along the optical axis relative to the support structure in directions that are opposite as between the two SMA actuator subsystems. a support structure; a camera unit comprising an image sensor and a lens system for focussing an image on the image sensor, the camera unit being supported on the support structure in a manner allowing the camera unit to tilt around two axes that are perpendicular to each other and to the optical axis of the lens system; and an SMA actuator system comprising two SMA actuator subsystems each comprising two SMA actuators disposed on opposite sides of the camera unit, each SMA actuator comprising a piece of SMA wire connected between the camera unit and the support structure, each SMA actuator subsystem being arranged, on differential contraction of the actuators thereof, to drive rotation of the camera unit around a respective one of said two axes that are perpendicular to each other and to the optical axis of the lens system, characterised in that: each SMA actuator comprises a piece of SMA wire connected at both ends to one of the camera unit and the support structure and intermediate its ends hooked over a hook on the other of the camera unit and the support structure, the SMA actuator system supporting the camera unit on the support structure in said manner allowing the camera unit to tilt around said two axes that are perpendicular to each other and to the optical axis of the lens system; and the respective SMA actuator subsystems are arranged, on contraction of the actuators thereof, to drive displacement of the camera unit along the optical axis relative to the support structure in directions that are opposite as between the two SMA actuator subsystems. each SMA actuator comprises a piece of SMA wire connected at both ends to one of the camera unit and the support structure and intermediate its ends hooked over a hook on the other of the camera unit and the support structure, the SMA actuator system supporting the camera unit on the support structure in said manner allowing the camera unit to tilt around said two axes that are perpendicular to each other and to the optical axis of the lens system; and the respective SMA actuator subsystems are arranged, on contraction of the actuators thereof, to drive displacement of the camera unit along the optical axis relative to the support structure in directions that are opposite as between the two SMA actuator subsystems.