A COMPLETE FILTER SYSTEM FOR THE CREATIVE PHOTOGRAPHER A more affordable alternative to circular filters is the versatile Cokin system, which uses square acetate filters and a special screw on holder. Invented by French photographer Jean Coquin and introduced in 1978, the Cokin Creative Filter System has grown to become the most popular filter system in the world and has spawned many imitators who make filters and other accessories that are compatible with the Cokin system.
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