We wanted to do a real world test of the best ISO rating of CineStill in Tungsten light. So we built a rig that synchronized 4 Nikon cameras with 50mm lenses on them, in order to test 4 great film stocks rated at different ISO's. Though CineStill is natively an EI500 film, we expected it to to prove comparable to an ISO800 film in low light. As a low end control we also threw in a roll of...