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Lighting flicker when shooting high-speed?


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#1 Karel Bata

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Posted 26 February 2012 - 07:58 AM

In a couple of weeks we're giving the new Olympus i-speed 3 cameras a trial run in a 3D mirror rig.

At what speeds does supply flicker start getting noticeable? We're on 50Hz AC. Are there 'safe' speeds?

The studio hasn't the supply outlets for any 10Ks, nor do we have the budget for Unilux lights, so we're thinking of using three 5Ks run off different phases to help smoothe out peaks and troughs. How effective is that?

Cheers!

Edited by Karel Bata, 26 February 2012 - 07:59 AM.

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#2 Gregory Wilson

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Posted 27 February 2012 - 06:51 PM

Hi Karel,

Usually around 72fps you will get flicker with small tungsten units, sodium vapor etc. A good rule is to keep your lights tungsten and 2k or larger. There are charts that show safe speeds with HMIs.

It is always a good idea to makes tests.



greg
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#3 Albert Smith

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Posted 27 February 2012 - 09:03 PM

I believe you'll be safe with 5K. lots of other posts on this though look around the info is on here.
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FJS International, LLC

Abel Cine

Media Blackout - Custom Cables and AKS

Ritter Battery

Metropolis Post

Visual Products

Rig Wheels Passport

CineLab

rebotnix Technologies

Technodolly

The Slider

Wooden Camera

Tai Audio

Aerial Filmworks

Glidecam

Broadcast Solutions Inc

Paralinx LLC

Gamma Ray Digital Inc