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re: 25 fps film in the US
- To: telecine group <telecine at alegria.com>
- Subject: re: 25 fps film in the US
- From: Dave Corbitt <dfc47 at earthlink.net>
- Date: Tue, 30 Nov 1999 17:08:16 -0500
- Resent-Date: Tue, 30 Nov 1999 16:09:06 -0600
- Resent-From: telecine at alegria.com
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Vince Forcier wrote;
> We have a client that wants to shoot 25 FPS in the US with some
>flourescent light sources. I know that there are flicker
Questions like this come up so often that I wrote an FAQ some time ago.
Here is a small excerpt from that that hopefully will answer your question;
1. Q; I'm shooting in the US for PAL video transfer and
distribution. If I shoot 25 fps will I have flicker problems due to 60 Hz
power and lighting?
A: Not if you carefully select the correct shutter angle. "The
use of a 150 degree shutter will ABSOLUTELY get rid of all 60Hz flicker
when filming at 25 fps", quote from Dave Satin of SMA Video.
2. Q; I'm shooting in Europe (or some other region with 50Hz
power) for NTSC transfer and distribution. If I shoot 24fps will I have
flicker problems due to the 50 Hz power and lighting?
A; Similar answer to #1 above however please observe "172.8
Degree shutter at 24 F.P.S. for shooting in countries with 50 Hz electric."
Quote from Steven Gladstone, cinematographer.
I trust the sources (both esteemed TIG members) but still the skeptic and
reality tester in me would always want to shoot a test first to make sure
all variables and unknowns are covered.
Support and Development Engineer
Innovation TK Ltd.
e-mail <dfc47 at earthlink.net>
Thanks to Seamus O'Kane for support in 1999
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