As a professional photographer and extensive user of filters, Jean COQUIN has invented a range of filters which is unique for its quality and diversity. It is important that a filter matches the optical precision of a lens. Definition, contrast and colour reproduction must not be sacrified to creativity. Which is why each COKIN creative filter is made of the material best adapted to the filter's ultimate use. Some filters are made out of organic glass (coloured and graduated filters, etc...) while other are made of mineral glass (polarizing filters, etc ...) , yet all undergo strict a quality control at each stage of production and guarantee photographers the quality provided by modern manufacturing technology.