|
|
This topic comprises 3 pages: 1 2 3
|
|
Author
|
Topic: Questions on 3-D Imax
|
|
|
|
|
Frank Prete
Film Handler
Posts: 55
From: Victoria, Australia
Registered: Sep 2000
|
posted 11-16-2000 06:50 PM
Gordon,Can you tell me more about the automation at IMAX and how it works? How similar is it to a standard cinemas automation system? Also, do all IMAX theatres run advertising off a 35 mm machine. The one in Melbourne does (Vic 8 35/70). The ads only fill about 30% of the screen and look very bad!!! Finally, does anyone know what the magnification is for an IMAX setup. I know that this depends on the situation, but does anyone know what the average magnification is? Frank.
| IP: Logged
|
|
William Hooper
Phenomenal Film Handler
Posts: 1879
From: Mobile, AL USA
Registered: Jun 99
|
posted 11-16-2000 10:02 PM
quote:
Titling the head with the polaroid glasses can allow the images to reach the wrong eye, visible as seeing both images fringing.
Wouldn't you stereo people tend to keep your head pointed the correct way, though? It seems the feedback of "3D better, now worse, etc." while the head moves around would be similar to the way auditory feedback causes you to point your head toward a sound source.
| IP: Logged
|
|
William Hooper
Phenomenal Film Handler
Posts: 1879
From: Mobile, AL USA
Registered: Jun 99
|
posted 11-16-2000 10:16 PM
Ooo, that made me realize something!Of course feedback would cause someone at a 3D movie to orient his/her head to optimize the 3D. So, in all those pictures you've seen of people in theaters wearing those 3D glasses staring straight ahead like the Devo army: haven't you noticed that here & there are people whose heads *aren't* in that perfect alignment, looking like out-of-step dancers in a chorus line? Those are the stereoblind people.
| IP: Logged
|
|
|
|
|
|
Phil Connolly
Film Handler
Posts: 80
From: Derby, England
Registered: May 2000
|
posted 11-17-2000 06:35 AM
Frank,Assuming a typical Imax screen is 25 meters across (78 feet-ish) and the frame area is approx 69mm across - the magnification required to fill the screen is 362 times. In comparison on a screen 10 meters (33 feet ish)wide a 20mm frame of 35mm film needs to be magnified 485 times. Trying to fill a 25 meter imax screen in the horizontal axis would require a 35mm frame to be magnified approx 1250 times. Assuming I've got my maths right, otherwise feel free to ignore me.
| IP: Logged
|
|
|
|
|
|
|
|
|
|
|
|
All times are Central (GMT -6:00)
|
This topic comprises 3 pages: 1 2 3
|
Powered by Infopop Corporation
UBB.classicTM
6.3.1.2
The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion
and agrees to release the authors from any and all liability.
|
Home
Printer-friendly view of this topic