I shot a commercial project last week that we chose to frame and crop to 2.35:1 frame. We landed on this aspect ratio so that we could carefully draw the audience’s attention to specific areas of the frame. The project was shot on the Canon C300, so we simply turned on those crop marks in camera, and framed with that intent. Now that we’re in post, we chose to lay out the footage on a standard 16:9 timeline in Premiere Pro, and are using the Motion effects tab to make minor vertical framing adjustments. It’s a pretty simple workflow, but there was some math involved and I had to google for a tutorial on the crop marks.

Here’s a great tutorial I located on how to lay out a PSD with crop marks, and the appropriate recipe for cropping the output from Premiere Pro. Simple, and it seems to work beautifully. Good luck!