Gamma is a French photo agency, founded in 1966 by Raymond Depardon, Hubert Henrotte, Hugues Vassal and Léonard de Raemy. Gilles Caron joined the agency shortly after its foundation. Gamma became a prestigious photojournalism agency: photographers who have worked at Gamma include William Karel, Georges Merillon, Françoise Demulder and Emanuele Scorcelletti.
In 1999, the agency was bought by Hachette Filipacchi photo group (GHFP), a division of Hachette Filipacchi Médias,[1]. Their name changed to the Eyedea group in March 2007[2], amidst reports that the agency was in financial distress. It was sold again in 2007 to Green Recovery,[1] an investment fund that buys distressed companies. On 28 July 2009, the parent company sought protection from creditors after making a loss of €3 million euro.[1] In April 2010, the commercial court in Paris ruled that François Lochon, former general director of Gamma Agency, would buy the Eyedea group for 100,000 euro[3].