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What did you expect from the title? That they used Einstein's equations to render the actors? Of course it's the black hole.

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Since the digital movie camera used to film the actors relies on the photoelectric effect to turn light into pixel data, you could say Einstein’s equations were used for the live-action portion too!

Um actually…

Chris Nolan doesn’t shoot digital. His more recent pictures (Interstellar included) are shot on a mixture of 35mm, 70mm and IMAX 70mm (!)

The light-sensitive chemicals in film also rely on the photoelectric effect! YOU CAN’T ESCAPE EINSTEIN, NOLAN.

What's the difference between 70mm and IMAX 70mm? Is it just the aspect ratio (2.20:1 vs 1.43:1)?

Yes, it’s an even larger format than traditional 70mm. The cells are physically larger. Anecdote: Nolan worked with Kodak to invent black & white IMAX film for Oppenheimer.

https://www.kodak.com/en/motion/blog-post/oppenheimer/

The film is run through the camera & projector sideways, allowing for a larger frame to be laid down on the same stock.

https://secureservercdn.net/198.71.233.183/gkz.aeb.myftpuplo...

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