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Shooting Overcranked in Europe, Avoiding Flicker

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David Heidelberger
Shooting Overcranked in Europe, Avoiding Flicker
on May 29, 2009 at 4:44:47 pm

Hello,

I know there's been a post on this before, but I have a slightly different question, I think.

We're shooting a documentary with the HPX-170 in Europe. Last time we were there, we got some incredible slo-mo shots (60fps) that were unusable because of flicker from fluorescent lights. We had no control since we were in a factory and just sort of had to run with what we were given. My question is, how do I set the camera to compensate for this when I'm shooting off-speed footage. We shoot 720/30pn. I assume I need some sort of combination of setting the right off-speed frame rate and the proper shutter speed. Any help would be greatly appreciated.

Thanks,
- David


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Noah Kadner
Re: Shooting Overcranked in Europe, Avoiding Flicker
on May 29, 2009 at 5:45:40 pm

The problem is you need a PAL compatible camera or find locations without florescents...

Noah

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David Heidelberger
Re: Shooting Overcranked in Europe, Avoiding Flicker
on May 29, 2009 at 6:32:58 pm

Thanks Noah,

Would it help to set the frame rate of the overcrank to 50fps in the 30pn mode (this can be done if you modify the scene file in a text editor)? Wouldn't that be like shooting with a PAL camera? Or does the fact that it's 29.97 instead of 30 and, presumably, 49.9x instead of 50 mess it up?

- David



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Noah Kadner
Re: Shooting Overcranked in Europe, Avoiding Flicker
on May 29, 2009 at 11:03:25 pm

It's still a 60i or 24p time base so you won't lose the flicker.

Noah

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John Fishback
Re: Shooting Overcranked in Europe, Avoiding Flicker
on May 30, 2009 at 5:52:43 pm

On pages 49 & 50 of the user manual AG-HPX170_oi.pdf there's a discussion about limiting the effect of shooting 60i in 50i land. If you know someone in Europe who could shoot a minute and send it to you, you might see what it looks like.

John

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