A camera system includes a camera having a lens, and a wiper assembly attached to the camera and configured for removing a contaminant from the system. The assembly includes a housing including a frame having a back panel that defines a first viewport covering the lens; a shield; and a disc. The shield defines a second viewport spaced apart from the first and is attached to the frame to define a wash chamber between the shield and the frame. The disc is formed from a transparent material and is disposed between the shield and the housing within the chamber so as to cover the lens at the first viewport. The disc is rotatable within the chamber between a first position in which the contaminant is disposed on and partially obscures the disc, and a second position in which the contaminant is not disposed on the disc at the second viewport.