However, scenes shot in Istanbul's historic Hagia Sofia locale were carefully done with the Alexa digital camera because of low light situations. But Prieto didn't like the fluorescent bulbs in the chandeliers, which gave off an ugly green hue, so he got permission to change them to tiny 7-watt incandescent bulbs to create golden points of light. The Turkish government was so impressed that it decided not to replace them afterward.

Meanwhile, they filmed the sequence at the Canadian Ambassador's home at a residence in Hancock Park, with Affleck encouraging the actors to stay there together for two weeks prior to the shoot. He used that familiarity to let them improvise.

But the location posed challenges for Prieto. "Ben wanted constantly to be rolling with two cameras to catch them improvising. However, the lighting was tricky because I had to make it look good in any direction and have it still be realistic. Also, the ceilings weren't high and Ben is tall, so it was hard keeping his lighting out of frame. I had to devise lighting instruments that were tight to the ceiling and still be able to control the lights so they weren't going all over the place."

Now Prieto has segued to another presumptive Oscar contender: Martin Scorsese's "The Wolf of Wall Street," which takes place in the late '80s and utilizes the cinematographer's trademark naturalism. "Maybe I should do sci-fi next," he quips.