His most famous film Shape Of The Moon won Best Documentary in the World Docs Competition at Sundance 2005 as well as at the International Documentary Film festival Amsterdam (IDFA) in 2004. Leonard developed a theoretical perspective for his work as well as a practical technique for an approach that he calls 'single shot cinema', involving long takes with a constantly moving camera. He has also designed a special camera mount that allows extraordinary stability and maneuverability in shooting.