Christopher Nolan’s 'The Dark Knight' changed the technical standards for blockbusters by being the first major feature film to use IMAX cameras for select sequences. Nolan and cinematographer Wally Pfister filmed 28 minutes of the movie, including the opening bank heist, on 70mm IMAX film. This provided a level of clarity and scale that standard 35mm film could not match. The success of the film, combined with the acclaim for Heath Ledger’s performance as the Joker, led to a surge in 'premium large format' screenings. Today, it is standard for major blockbusters to be filmed or specially formatted for IMAX theaters to justify higher ticket prices. [Image comparing 35mm film frame size vs. 70mm IMAX film frame size]