Re: [photo-3d] What size is your club's screen?

["John A. Rupkalvis" <stereoscope@xxxxxxxxxxxxx>]

----- Original Message -----
From: <gccampos@xxxxxxxx>
To: <photo-3d@xxxxxxxxxxxxxxx>
Sent: Monday, April 02, 2001 12:53 AM
Subject: [photo-3d] What size is your club's screen?


> The next question is what aspect ration should I use?  I've been
> assuming I should have at least a 1:1.4 ration for full frame RBT, if
> not a 1:1.5 for 2x2 projection.  I notice though that so many other
> screens are square.  Is that because of the Realist Format of 23 x 24?

Club screens are often square.  Originally this was to accommodate both the
5 perf. Realist (vertical but nearly square 23 x 24) and the 7 perf.
Verascope-Iloca-Belplasca (horizontal 24 x 31), as well as View-Master
images which are also nearly square, but slightly horizontal.  Later, this
worked out well for 2 x 2s shot with paired conventional 35mm cameras, since
some people shot hypers with the cameras mounted side-by-side on a bar,
while others preferred mounting the cameras base-to-base for a more normal
stereo base, and shot verticals.  Also, square screens were often used by
people shooting flat 35mm images, since they would often mix horizontal and
vertical views in the same slide tray.

Arguments have gone on for decades (centuries?) about the merits of the
aesthetics of different screen shapes.  I like a horizontal shape as this
approximates closer the human field of vision, and with large screens has
some advantages in terms of apparent depth enhancement as a result of
peripheral vision effects, but that is just a personal preference.  There
have been some interesting papers on how we subconsciously compare
monoscopic outer field information with stereoscopic inner field
information, and certainly the original Cinerama, with its monoscopic images
looking very realistic on the deeply curved extreme horizontal format
screen, seems to support parts of this view.

Since your large piece of screen material allows you to cut different
smaller screens from it, I would certainly think that your approach of
making them in different aspect ratios is a good one, since you can then
select what is most appropriate for a particular screening.

JR






 

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