An imaging system for an autonomous vehicle comprises a camera for capturing images within a first field of view, a transparent disc arranged in front of the camera such that the transparent disc covers the field of view of the camera, an actuator configured to rotate the transparent disc, and a mounting arrangement configured to mount the camera, the transparent disc and the actuator on an autonomous vehicle. Also described is an imaging system comprises a camera for capturing images within a first field of view through a transparent surface, and a fluid dispenser constructed and arranged to spray a fluid onto the transparent surface within the first field of view. Also described is an image capture system for an autonomous vehicle comprising two such cameras with respective transparent discs and actuators.