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IMAX vs. IMAX 70mm: The difference between these two cinema formats

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Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#11

Post by ungreased0675 »

gempir wrote: post #2

I'm curious about the opinions on 70mm (non-IMAX) vs Digital IMAX. What do you prefer if you have tried both. Because those are the only mostly accessible options around the world. Sound is also something to consider, because depending on the Theater they might have wildy different sound setups even different audio standards.

For me, sound is more impactful than screen resolution or aspect ratio. Subwoofer arrays powerful enough for the audience to feel sub-bass are expensive, large, and need to be placed precisely in the room. I don’t think I’ve ever been in a movie theater that had acoustics rivaling a top-tier music venue or concert hall.

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#13

Post by jl6 »

mort96 wrote: post #4
throw0101a wrote: post #3

Earlier quoted context omitted.

I've seen non-IMAX 70mm referred to 5/70 because the image uses five perforations per frame; IMAX 70mm is then 15/70 because it uses fifteen perforations. Digital IMAX is much bigger: * https://old.reddit.com/r/imax/comments/pysn87/tremendously_h... * https://old.reddit.com/r/imax/comments/1405mz0/standard_70mm...

How much can we trust the "Reddit IMAX community"? The people heavily invested in a technology as their hobby aren't always the best sources of objective technical information; is /r/imax more of an "audiophile forum" or more of a forum of people who actually know their stuff?

Passionate hobbyists are often a great source of technical information, and usually more objective than industry sources. The thing to watch out for is people who have become so absorbed by their hobby, they start to put great subjective weight on distinctions that would be without difference to a "normal" person. Audio gear, gourmet food, fine wine, running shoes... It's XKCD 915 all the way down. I also recommend Penn & Teller: Bullshit! S03E12 ("The Best") on this subject.

Good for the hobbyists, if it enhances their enjoyment, but if you're a casual, microscopic variations are going to be dwarfed by other factors.

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#14

Post by davidferguson »

If you want a very in depth technical look at the differences between IMAX 70mm, 70mm and 35mm for _The Odyssey_, I wrote an article about this last month.

https://www.theppt.org/rewind/articles/where-can-you-watch-t...

But here are my nit-picks from the article linked here. I'm only commenting on the 15/70mm IMAX parts, because I'm not knowledgable enough about the digital IMAX foramats.

> The extra resolution, up to 18K equivalent

The claim of 18K is entirely untested. No one has ever measured what the theoretical resolution of an 15/70mm IMAX system is. Kodak's film may me theoretically capable of resolving this, but what about the camera lens, the GT projector lens and field flattener, and everything else involved? Until a study is actually done, I don't think the 18K is a good number to band about.

> thanks to the use of single or even dual 15kW water-cooled xenon bulbs

No cinema is using dual lamps. The dual lamps are used for 3D - one lamp per "eye" (right and left). But no 15/70mm IMAX is currently showing 3D, I think the last was the London Science Museum (but that's a guess, so don't take as truth). So it is only single lamp. 15kW is also not always true - some smaller 15/70mm IMAXes use 12kW or around that.

> However, there are only around 24 such theaters in the US, nine in Canada and six elsewhere around the world.

This is incorrect. There are actually 25 in the US, and 7 in the rest of the world, totalling 41 prints.

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#15

Post by dudefeliciano »

ramesh31 wrote: post #10
throw0101a wrote: post #5

Earlier quoted context omitted.

What is inaccurate about this size comparison? * https://old.reddit.com/r/imax/comments/1tw4jyy/psa_70mm_and_... * https://www.youtube.com/watch?v=4KBEcjZN8io Certainly we need to be mindful of biases, but you can also simply be falling into a tu quoque , ad hominem fallacy. At the end of the day, are these 'fancy' theatre experiences (IMAX and the others out there) worth the extra ticket price to you? Certainly Chri…

>"Certainly Christopher Nolan thinks so since he was willing to put up with the hassle of the IMAX gear for months on end (including airlifting them up to top of mountains), but what will you get out of it watching is something on you can answer." The 70MM IMAX showings at Lincoln Square are still completely sold out 4x/day for the next month. People are filling the theater at 6AM on a Saturday to see it. The market…

I think that has to do with the marketing and all the memes about how much "less" of the film you see if not watching it on 70mm IMAX

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#16

Post by nottorp »

fsh wrote: post #9

IMHO, the only reasons for using 70 mm IMAX are nostalgia and marketing. Digital movie cameras have far better color reproduction, more dynamic range, zero frame jitter, and plenty of resolution without grain. They are also small and silent which allows far more interesting shots than what is possible with a 70 mm monster. Kubrick and Lean used 70 mm because it was the best technology available at the time. Today, th…

I'd say one of the advantages of analog filming is it's more expensive to "color correct" digitally after. So maybe you get less monochrome films?

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#18

Post by [deleted] »

ramesh31 wrote: post #10
throw0101a wrote: post #5

Earlier quoted context omitted.

What is inaccurate about this size comparison? * https://old.reddit.com/r/imax/comments/1tw4jyy/psa_70mm_and_... * https://www.youtube.com/watch?v=4KBEcjZN8io Certainly we need to be mindful of biases, but you can also simply be falling into a tu quoque , ad hominem fallacy. At the end of the day, are these 'fancy' theatre experiences (IMAX and the others out there) worth the extra ticket price to you? Certainly Chri…

>"Certainly Christopher Nolan thinks so since he was willing to put up with the hassle of the IMAX gear for months on end (including airlifting them up to top of mountains), but what will you get out of it watching is something on you can answer." The 70MM IMAX showings at Lincoln Square are still completely sold out 4x/day for the next month. People are filling the theater at 6AM on a Saturday to see it. The market…

[deleted]

Re: IMAX vs. IMAX 70mm: The difference between these two cinema formats

#19

Post by phoghed »

ramesh31 wrote: post #10
throw0101a wrote: post #5

Earlier quoted context omitted.

What is inaccurate about this size comparison? * https://old.reddit.com/r/imax/comments/1tw4jyy/psa_70mm_and_... * https://www.youtube.com/watch?v=4KBEcjZN8io Certainly we need to be mindful of biases, but you can also simply be falling into a tu quoque , ad hominem fallacy. At the end of the day, are these 'fancy' theatre experiences (IMAX and the others out there) worth the extra ticket price to you? Certainly Chri…

>"Certainly Christopher Nolan thinks so since he was willing to put up with the hassle of the IMAX gear for months on end (including airlifting them up to top of mountains), but what will you get out of it watching is something on you can answer." The 70MM IMAX showings at Lincoln Square are still completely sold out 4x/day for the next month. People are filling the theater at 6AM on a Saturday to see it. The market…

4x a day for a month on so few screens isn’t even that many tickets comparatively.
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