I for one have never seen an Ultra Panavision 70 film projected correctly (i.e., 2.76:1) inside a theatre in my entire life. I saw a restored version of Ben-Hur (which was shot in Camera 65, the exact same process) at the 2011 New York Film Festival, but they showed it within a 2.55:1 aspect ratio. I’m not persuaded that Ultra Panavision 70/Camera 65 flicks that played in the ’50s and ’60s (Raintree County, Ben-Hur, How the West Was Won, Mutiny on the Bounty, It’s a Mad, Mad, Mad, Mad World, The Fall of the Roman Empire, etc.) were shown in 2.76:1. I suspect that they were mostly projected at 2.55:1 except at the Cinerama Dome, which of course was built to project extra-wide Cinerama films. 2.76:1 is really, really wide. I’m familiar with the full-width Ben-Hur and Mutiny on the Bounty only from looking at the DVD/Blurays. So when I see an Ultra-Panavision 70 version of The Hateful Eight early next week, it’ll be my first encounter with this process on a big screen.