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1917 IMAX format (5 replies and 2 comments)

Davinki
2 months ago
Davinki 2 months ago

Hello Roger, was there a reason why the 1.9:1 format was selected as the format for the IMAX version of 1917 instead of the 1.43:1 format that the LF is natively capable of shooting? Did it just not look good projected on the screen or something?

dmullenasc
2 months ago
dmullenasc 2 months ago

Digital Imax is 1.9 : 1.

dmullenasc
2 months ago
dmullenasc 2 months ago

https://simpledcp.com/picking-right-aspect-ratio/»

DCP's and digital projector chips (2K or 4K) are 1.9 : 1 if maximum resolution is used.

dmullenasc
2 months ago
dmullenasc 2 months ago

Latest laser projection IMAX systems though are now capable of the original 1.43 : 1 format. But since most digital cameras don't record images quite that tall and most movies are composed for widescreen, you'll still mainly see 1.9 : 1 for digital IMAX releases. Exceptions might be for things shot in IMAX film (15-perf 65mm) or CGI animation.

Davinki
1 month ago

Yeah I know that typically it's 1.9:1, but Here's the thing, the LF sensor is exactly 1.43:1 in it's opengate mode, in theory it should work, it was utilized on dune, my concern was that maybe it wouldn't look good or as good as 15 perf 65mm for a screen that size considering how much lower the resolution is compared to 15 perf, but then again, the laser projectors that project full IMAX are only 4k so maybe it doesn't matter.

Roger Deakins
1 month ago
Roger Deakins 1 month ago

The choice of the screen ratio was always that of IMAX, the company. The image quality that the LF sensor is comparable, if not marginally superior, to that of 65mm film emulsion. Prior to making an IMAX version of 'BR2049' we did look at a comparison between the standard Open Gate Alexa image and 65mm, as well as with both spherical and anamorphic 35mm.

Davinki
1 month ago

Wow you replied! Okay good to know the LF can go alongside 15 perf in a 1.43:1 projection setting. Also I'm guessing you tested the master anamorphic lenses when testing for anamorphic am I correct?

Roger Deakins
1 month ago
Roger Deakins 1 month ago

I was comparing existing IMAX footage rather than shooting anything myself.

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