Scanning the Tribeca slate, it’s hard not to wonder what exactly “Tondoscope” is. The capsule for Gust Van den Berghe’s Lucifer claims this is an aspect ratio of his own devising, and this video provides some clarity on what that mean. You can watch a trailer here, but the basic idea is that Tondoscope is a circle. In this nine-minute video, Van den Berghe explains the origins of his idea, and his DP and assorted representatives of the University of Brussels make it happen. From carving the lens to sound mixing (tricky when characters restricted to a circle move not from left to right but further and closer away), “Tondoscope” posed a lot of challenges and food for thought.