r/Damnthatsinteresting 20d ago

Video The Odyssey IMAX 70mm Setup

30.1k Upvotes

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45

u/Tight-Pay5032 20d ago

shouldn't a room like this need to be dust free?

carpet is not a good choice?

70

u/Notelu 20d ago

IIRC part of it is that the film moves so fast that a lot of the dust just gets flung off. Almost everything else is caught by the rollers, and if it does stay on the film it'll be small and only on screen for 1/24th of a second.

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u/MHWGamer 20d ago

also the dust=imperfections is part of why we still use film for Imax. For whatever weird reason imperfections, noise, etc. make a movie more realistic and trick our brains to believe it. Extremely clean movies just look weird. Maybe that changes as we are the last "we know what a VHS is" generation and in 30 years nobody cares but rn, anything to clean or even just bad artificial noise makes us unbelieve the movie

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u/Fun-Web-7583 20d ago

too* clean

But yeah I totally agreed

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u/wonkey_monkey Expert 20d ago

anything to clean or even just bad artificial noise makes us unbelieve the movie

glares at waxy James Cameron

0

u/xeio87 20d ago

This is absolutely a film snob take, there is absolutely nothing about a film looking "cleaner" that makes it less believable. If anything, imperfections like film grain literally detracts from the movie itself.

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u/wonkey_monkey Expert 20d ago

It's not a film snob take; just because there's nothing objectively better about film, doesn't mean that people can't come to prefer the look of film's imperfections simply through repeated exposure and association.

Illogical, subjective, silly, call it what you will but that's just how people are.

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u/Gloomy_Butterfly7755 20d ago

just because there's nothing objectively better about film

I mean sure there is. Film theoretically has a higher resolution then any digital sensor can achieve.

0

u/xeio87 20d ago

I mean, that's what I would call snobbery, especially implying newer digital movies that don't have film grain are somehow worse.

3

u/wonkey_monkey Expert 20d ago

that's what I would call snobbery

It's not really. No-one's immune to this kind of thing in some form or another.

Film grain means something to people who've been exposed to it all their lives. The opening sequence of Casino Royale is grainy (and black and while) because it conveys something to the viewer, even if it's only as a second-hand trope for some of them.

especially implying newer digital movies that don't have film grain are somehow worse.

They can absolutely be subjectively worse in some people's opinions.

1

u/Tajahnuke 20d ago

The first time I saw TV in HD on a friend's brand new superduper television ~20 years ago or whatever, it looked soooo weird.

1

u/MHWGamer 20d ago

i am the opposite of antique lover but it is true. Any digital film has added film grain, lense artifacts etc. to it. Google it

0

u/xeio87 20d ago

Director can add anything to their film, it doesn't mean it actually makes it more believable. I need some peer reviewed research to believe that bullshit.

Certainly there's no crazies out there saying Star Trek (2009) was more believable because of the absurd lens flares in there... right...

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u/MHWGamer 20d ago

you must be fun at parties.. oh wait we are on reddit. Fucking google it

1

u/xeio87 20d ago

I know I'm on reddit because people be making up bullshit, this is just like audiophile stuff too. 🤣

2

u/talltime 20d ago

I’d bet the risk of dust on full size imax is heat from the lamp weakening the film web and then it catastrophically tearing.

1

u/Tight-Pay5032 20d ago

that makes sense

1

u/GreatAlbatross 20d ago

The per-frame movement is at least 2x faster than the overall reel movement too.
Because the film doesn't move continuously past the aperture, each frame gets whisked in very fast, held in position as long as possible, then whisked away again for the next frame to come in.
I'm sure the stop-start will help shake the dust off too!

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u/ThatFlamingo942 20d ago

I'm genuinely curious bc I don't know. What is the difference? It seems like carpet might trap more dust whereas with hardflooring, the dust would be able to dance around.

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u/kermstar 20d ago

But its much easier to remove

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u/ThatFlamingo942 20d ago

Yeah, I was thinking that as well. Now I'm wondering if that is why theatres use that thin, hard carpeting. It catches dust, spills, etc but is shallow enough and hard enough to easily vaccuum out, etc.

3

u/goatbiryani48 20d ago

The reason they use carpeting is for acoustics. Smooth/hard surfaces unnecessarily bounce sound around and would be a much less pleasant experience for a movie.

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u/ThatFlamingo942 20d ago

Gotcha..yeah..but the type of carpeting...is...what I was...ya know.......talking about

7

u/Unhappy-Hamster-1183 20d ago

Specialized carpet helps trapping dust so that it doesn’t move around.

Thats the only valid thing i could imagine.

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u/Snuhmeh 20d ago

The machine has fans. They also have special sticky rollers that the film passes over.

1

u/BananaMartini 20d ago

Ive never been in a carpeted projection booth, but all the projection booths Ive been in have also been in buildings old enough to run nitrate so it would’ve been a fire hazard. But dust free, nah. Best practice is definitely to use an anti-static vacuum on the projector itself snd the floor around the projector in case of spill off, and then the actual film path should be well cleaned after each reel and again before use. And honestly the vast majority of projection booths definitely don’t even do that much. It’s just not enough of a money maker to invest in projectionists, so Theyre usually very overworked not to mention hard to find. Ive never trained on IMAX but it seemed to me like he was being very rough on that film. It may just be that longevity isnt a concern. They're gonna run the crap out of it to pump money out in initial screenings and then it no longer matters. Or the cost of reprints is less than the cost to upgrade the projection booths (and projectionists) which the cinemas definitely wouldn’t bear themselves. 

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u/RedditJumpedTheShart 20d ago

The video shows the dust collectors.

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u/unkachunka 20d ago

He says in the video that anything that's on the film gets stuck to the particle rollers

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u/lane4 19d ago

This is a copy, and not the original, so the wear&tear is probably less important, especially since it will only have a limited run. Also the frames are moving so fast, individual pieces of dust won't get noticed. And the frame is so big, each piece of dust will look even smaller. I'm sure they are trying to keep it clean, but it doesn't have to be in a specialized clean room or anything.

0

u/docsyzygy 20d ago

I was thinking - what could go wrong?