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Shooting 25fps with 60hz lighting . . .

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Chris Oben
Shooting 25fps with 60hz lighting . . .
on Feb 9, 2009 at 7:33:08 am

Is it possible to set the RED shutter angle to exactly 150 degrees with a system frequency of 25fps?

Shooting in North America - U.K. Client wants 25fps for PAL post / delivery . . .

Chris M. Oben

http://www.chrisoben.com


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Noah Kadner
Re: Shooting 25fps with 60hz lighting . . .
on Feb 12, 2009 at 3:01:50 pm

I'd run tests but I'd imagine you'll get strobing.

Noah

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Chris Oben
Re: Shooting 25fps with 60hz lighting . . .
on Feb 12, 2009 at 7:28:51 pm

Hi Noah,

Thanks for your response . . . the whole idea of course is to avoid strobing altogether. The 150 degree shutter at 25 fps is exactly 1/60 which theoretically will eliminate 60hz flicker.

On set the 150 degree shutter did work - except that we were filming in a theatre with the projector set to 24fps! In the end the fluctuation of the projector was acceptable as our key lights were not flickering when we set to 1/60th shutter . . .

Chris Oben

Chris M. Oben

http://www.chrisoben.com


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