The Cokin Filter A057 Star 4 contains a series of thin lines etched into the optical glass of the filter. These thin lines generate multiple points of light, or 'stars', that emanate from a central light source. The result is a photograph with a more seductive, sparkling appearance. The lines produce a four-pointed star with a line down the middle of the light.
A large aperture is generally sufficient to achieve the star effect. The filter is made of high quality optical glass. The Cokin star filters produce a particularly nice result for weddings, product photos, parties or night photography, for example.