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24p strobing

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Robert Marty
24p strobing
on Jun 3, 2008 at 5:54:18 pm

I have used a Canon XL2 lots in 24p. The SONY EX1 1080p in 24p is so stroby.
I find it totally unusable in most cases. What is the difference between other cameras and this one.
I have used the Panasonic HVX200 at the rental house I get cameras from but this is totally unusable from what I can tell. It looks nothing like film.
Im thinking there must be something I am overlooking.
Any help is greatly appreciated.

Cheers,

Rob

http://www.islandvoicetv.com


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Noah Kadner
Re: 24p strobing
on Jun 3, 2008 at 6:58:42 pm

Probably your shutter settings.

Noah

My FCP Blog. Unlock the secrets of the DVX100, HVX200 and Apple Color and Win a Free Letus Extreme.
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Robert Marty
Re: 24p strobing
on Jun 3, 2008 at 7:09:54 pm

Ill keep playing with the settings to see where this takes me.

Thanks

Noah

http://www.islandvoicetv.com


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Don Greening
Re: 24p strobing
on Jun 3, 2008 at 8:37:53 pm

Make sure your shutter control switch below the lens on the front of the camera body is set to "on" and that your shutter speed is set to at LEAST 1/48th per sec. if shooting 24 fps.

- Don


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Robert Marty
Re: 24p strobing
on Jun 3, 2008 at 9:19:06 pm

Thanks Don,
Ill give that a try right away.
Ill post how it worked out.

Rob

http://www.islandvoicetv.com


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Andy Nickless
Re: 24p strobing
on Jun 5, 2008 at 7:04:41 am

Don, by "LEAST 1/48th" I presume you mean 1/48th sec or SLOWER?

Surely a higher shutter speed is going to exaggerate the strobing?

And by the way, all of us over here in PAL land have been shooting at 25 fps for donkey's years because we had no choice. There can't be a noticeable difference between 24 and 25 fps - can there??


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Don Greening
Re: 24p strobing
on Jun 5, 2008 at 6:41:33 pm

[Andy Nickless] "Surely a higher shutter speed is going to exaggerate the strobing?"

The reason for my post is because I'm finding that a lot of EX users don't realize that they need to have the shutter switch turned on before they're able to control the shutter speed. With the switch off the camera will default to the same shutter speed as the frame rate i.e. 24p will be shot at 1/24th sec. which is too slow to record smooth motion during camera moves. A good shutter speed baseline to start at is always at twice the frame rate.

24p (23.98) - 1/48
25p - 1/50
30p (29.97) - 1/60
50i - 1/50 (still recording 25fps but with 2 interlaced fields)
60i (59.94) - 1/60 (still recording 30fps but with 2 interlaced fields)

This advice is based on my own experience but is also mirrored in articles I've read.

Strobing video is defined these days as the "Private Ryan" look and is achieved by using high shutter speed settings. There seems to be some confusion, at least to me, on how people use the terms "stroby video" and video that suffers from motion blur because the shutter speed is too low. Whatever the original poster is describing I'm just trying to cover all the bases by mentioning the shutter switch and where one should start with regard to shutter speed testing.

- Don



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