Although it has been almost two weeks since the Prague premiere of what is likely to be this year's biggest blockbuster, Prague's IMAX cinema is still packed. Although IMAX cinemas exist in other countries, Prague's is unique because it is one of the few in the world capable of projecting physical 70mm film from reels. Christopher Nolan | Photo: Melinda Sue Gordon, Universal PicturesDemand for 70mm IMAX screenings of The Odyssey at Prague's Flora cinema has been enormous. Video of The Odyssey | Official New TrailerHow long the 70mm film print will continue spinning through the projector depends on audience demand. Christopher Nolan's previous film, Oppenheimer, continued to be shown from its 70mm print at Prague's IMAX for several weeks after its premiere.