Darkens blue creating dramatic contrast between sky and clouds.
Creates greater contrast between flowers and foliage.
Used in scientific photography.
Excellent for copying blueprints.
Not recommended for skintones.
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.