Eric Koretz served as director of photography ; he joined the team during a shift in focus in January 2008 . Koretz used a Panasonic AG @-@ HPX500 P2 HD camcorder . He commented to industry publication Videography about the choice of technique , that due to the intensity of the production team 's travel schedule tape format would not have been an option . He stated he preferred using P2 cards over the HDD @-@ based format due to its superior reliability . During the editing process , Glen Echo Entertainment utilized eight Apple Macintosh computers with Intel processors , equipped with Apple 's Final Cut Pro editing software .