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From: ron@brl-vgr.ARPA (Ron Natalie )
Newsgroups: net.columbia
Subject: Re: 70mm shuttle film to be made!
Message-ID: <2211@brl-vgr.ARPA>
Date: Wed, 7-Mar-84 17:50:49 EST
Article-I.D.: brl-vgr.2211
Posted: Wed Mar  7 17:50:49 1984
Date-Received: Sat, 10-Mar-84 14:29:42 EST
References: <219@ll1.UUCP> <374@t4test.UUCP>
Organization: Ballistics Research Lab
Lines: 19

The reason the field is wider is because the actual area of film per
frame greater.  This is accomplished by making the recorded image
70mm (less sprocket holes) high.  This appears to be sideways from
most film formats who use the 70mm dimension as the width of the
image.  Conventional 70mm also has space allocated for soundtrack.
IMAX uses a separate piece of 35mm magnetic coated film (tape?) for
sound.  There is no squeezing of the picture (like cinemascope or
panavision).

There are two modes of operation.  Conventional IMAX is for showing
on flat screens.  These are typically 70' by 50'.  OMNIMAX uses a
different lens that gives a fishbowl effect for showing on round
surfaces (like the inside of a planetarium dome).  I'm not overly
fond of OMNIMAX.

Anyone know if they are going to shoot only IMAX, only OMNIMAX or
a combination?

-Ron