Claim: Dunkirk (2017 film) was shot on IMAX 65 mm and 65 mm large format film stock.
Evidence: Dunkirk is scheduled to be released on 21 July 2017 in IMAX.
IMAX is a 70 mm motion picture film format and a set of cinema projection standards developed in Canada in the late 1960s and early 1970s by Graeme Ferguson , Roman Kroitor , Robert Kerr , and William C. Shaw.