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.
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.