The most popular of the contrast filters for black and white photography, Red creates dramatic effects by brightening
red and orange while darkening blue and blue-green in sky, water and architectural scenes. With underexposure, the red
filter may be used to simulate a moonlit scene at midday. With infrared film, the filter gives extreme contrast to
skies, turning foliage white and cutting through fog and haze. Red filters are available in most sizes.