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Ballest Question


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#1 Nicholas A Micros

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Posted 28 December 2008 - 04:31 PM

I am talking to a friend who has some house hold electrical work and we are wondering if you could use a average ballast in film or video.

Doesn't matter what kind of light it is or wattage. Just a hypothetical question.


Seems a lot cheaper.

Edited by nickmicros, 28 December 2008 - 04:33 PM.

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#2 David Mullen ASC

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Posted 28 December 2008 - 05:43 PM

We shoot in locations all the time that have ordinary ballasts in fluorescent fixtures. Generally you just have to be in the "safe" window for the hertz flicker. For 60 Hz fixtures, 24 fps crystal-sync at a standard 180 degree shutter angle is within that safe window.
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#3 Jim Hyslop

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Posted 28 December 2008 - 06:45 PM

We shoot in locations all the time that have ordinary ballasts in fluorescent fixtures. Generally you just have to be in the "safe" window for the hertz flicker. For 60 Hz fixtures, 24 fps crystal-sync at a standard 180 degree shutter angle is within that safe window.

Is there a formula to calculate the safe window?
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CineLab

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Aerial Filmworks

Willys Widgets

Broadcast Solutions Inc

Metropolis Post

Media Blackout - Custom Cables and AKS

Abel Cine

New Pro Video - New and Used Equipment

Ritter Battery

Rig Wheels Passport

The Slider

Tai Audio

Glidecam

Paralinx LLC

FJS International, LLC

Wooden Camera

rebotnix Technologies