Re: WHO STARTED: how much of what we see is black?

From: Yoel Meranda (email suppressed)
Date: Tue Dec 04 2007 - 12:56:54 PST


Hi David,

I started the discussion. I live in Istanbul (will write you my address).

No, I'm not a film professor but It would be nice to teach film
someday... I got a lot of answers, I thought it was a very nice
brainstorming... It should be in the archives.

yoel
waysofseeing.org

On Dec 4, 2007 5:43 AM, Jim Carlile <email suppressed> wrote:
>
>
> I think it was some film professor somewhere. Did he ever get an answer?
>
> The simple one is: it depends upon the number of blades in the projector
> shutter, their degree of coverage of the full shutter rotation, and the
> quickness of the film pulldown.
>
> It's more light than dark-- figure the blades cover the light beam anywhere
> between approximately 28 to 36 or so percent of the time. Some
> projectionists shave down the blades to get more light on the screen, but
> there's a limit to that. The blade sectors need to be able to cover the
> complete pulldown in order to prevent ghosting.
>
>
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