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shooting 24fps in 50hz country


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#1 Bruce Greene

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Posted 14 February 2008 - 10:41 PM

I'm going to be shooting a feature in a 50hz country. The director has told me that they would like to shoot at 24fps.

My concern is with any 50hz flickering lights.

I suppose I can have our generator set to 60hz perhaps and I can ask for, but I'm not sure I'll receive flickerless ballasts for HMI lights. But there may be some practical lights I will have no control over.

Is there a shutter angle that will enable safe shooting of 50hz lights at 24fps?

Thanks so much for your help.

-bruce
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#2 Dominic Case

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Posted 15 February 2008 - 12:51 AM

172.8 deg. It's quite precise, not much margin for error.
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#3 Bruce Greene

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Posted 15 February 2008 - 01:34 AM

172.8 deg. It's quite precise, not much margin for error.



Thanks Dominic,

It's been a while since I operated the shutter angle myself. Would a Moviecam compact or Arricam allow such a precise setting?
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#4 James Madrid

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Posted 15 February 2008 - 03:44 AM

Yes, the moviecam compact and both the Arricam ST and LT will allow you to set the shutter to 172.8, the moviecam does it mechanically (with the supplied combitool) and the arricam does it electronically
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#5 Tim Carroll

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Posted 15 February 2008 - 10:01 AM

Yes, the moviecam compact and both the Arricam ST and LT will allow you to set the shutter to 172.8, the moviecam does it mechanically (with the supplied combitool) and the arricam does it electronically


Yeah, my Arri 2C came set up that way, with a 172.8ยบ shutter and stamped on the back of the camera it says 50Hz/24bps. Made for the European market.

Best,
-Tim
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#6 Rob van Gelder

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Posted 16 February 2008 - 10:06 AM

Bruce, there is no reason to use a 60Hz generator in a 50 Hz country, in fact it will more hassle as you cannot mix your lights with existing practicals, streetlights fluo's etc. that are in frame.

it is totally normal to shoot 24fps / 172.5 shutter for cinema in a 50Hz country.
pick up an American Cinematography Manual and it is in there
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