Contributor Sean Duffy interviews  Julian Antos,  The Music Box Theatre‘s  Technical Director, about the theater’s upcoming 70MM Film Festival.  For the third time in three years, the Music Box Theater in Chicago is putting on a film festival dedicated specifically to showcasing 70MM. This year’s festival, “70MM Film Festival: The Ultimate Version”, includes previously shown classics like 2001: A Space Odyssey, Vertigo, Lawrence of Arabia, and It’s A Mad, Mad, Mad, Mad World, as well as first-time prints of Brainstorm, Starman, Krull, and even a collection of shorts co-presented with the Northwest Chicago Film Society.  Not only is this the Music Box’s biggest 70MM festival yet in terms of its programming, it’s also the first with their new 41-foot