The presence or absence of a Kodak 2383 label on some IMAX 15-perf strips of "Sinners" is likely due to the film being shot using two different film stocks: Ultra Panavision 70 and IMAX 15-perf 70mm. Ultra Panavision 70 likely used a different Kodak film stock (likely Kodak 2383, as it's a common print film) than the IMAX 15-perf scenes, which used Kodak 65mm Ektachrome.
Here's a more detailed explanation:
"Sinners" was shot on two film formats:
The film utilized both Ultra Panavision 70 and IMAX 15-perf 70mm, allowing for a unique visual experience and visual storytelling.
Ultra Panavision 70:
This format likely uses Kodak Vision 2383 or a similar Kodak print film, which would explain the presence of the 2383 label on some strips.
IMAX 15-perf 70mm:
For the IMAX scenes, Kodak developed and provided a custom 65mm Ektachrome film stock, the first time Ektachrome has been used in the 65mm format. This explains why some strips might not have the 2383 label as they were shot on Ektachrome.
Different Perforations:
IMAX 15-perf has 15 perforations per frame, while Ultra Panavision 70 has a different aspect ratio and likely a different perforation pattern. This visual and technical distinction further contributes to the differences in the film stock used.
In essence, the presence or absence of the 2383 label indicates the use of different film stocks for different parts of the film, reflecting the innovative shooting approach of "Sinners".