Christopher George Joseph Challis BSC, FRPS (18 March 1919 – 31 May 2012) was a British cinematographer who worked on more than 70 feature films since beginning in the industry during the 1940s.After working as camera operator on several films for Michael Powell and Emeric Pressburger, he made his debut as director of photography on The End of the River (1947) one of their projects as producers.