A lens guard for protecting a camera includes a lens-guard housing, a pressurized gas system, and a gas supply. The housing defines an opening and has a transparent protective lens disposed in the opening and having an outer surface exposed to the environment, an upper portion, and a portion defining apertures shaped to respectively receive therein camera support rods operable to mount the lens-guard housing to the camera in front of a lens. The pressurized gas system is operable to remove fluids and debris from the outer surface of the protective lens. The pressurized gas system includes a blow tube mounted to the upper portion of the housing and having a plurality of outlets directed towards the outer surface of the protective lens. The gas supply fluidically connects to the blow tube and is operable to supply pressurized gas to the blow tube and through the outlets thereof.