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Shutter Speeds


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#1 jonnyh1968

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Posted 29 July 2005 - 01:13 AM

Are there any shutter speeds that we should not use at 24p ? I thought I read somewhere one time that 1/24 is bad for some reason. too blurry with tracking movements? Or it will not import nicely into FCP? Any thoughts?

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#2 drew_town

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Posted 29 July 2005 - 01:49 AM

Shutter speeds slower than 1/60 will start to show motion blur. The longer the shutter is open (electronically in this case) the more motion is recorded. High shutter speeds such as 1/250 produce "sharp and snappy" motion representations.
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#3 David Mullen ASC

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Posted 29 July 2005 - 10:40 AM

There's no hard line here because different shots can have different degrees of motion. Obviously for a static shot & subject, you're not really going to tell a difference between 1/24th and 1/200th.

A film camera can do shorter shutter speeds, but a 24 fps, it is usually limited to 1/48th as the longest shutter speed if using a 180 degree shutter. So using a similar shutter speed (1/48th, 1/50th, 1/60th) on your 24P camera is a good idea unless you need more light or want a different motion rendition. 1/24th creates a somewhat smeary motion that is reminiscent of interlaced-scan video. But I find that going to 1/32nd is not too objectionable.
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#4 Tim J Durham

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Posted 29 July 2005 - 02:33 PM

Are there any shutter speeds that we should not use at 24p ? I thought I read somewhere one time that 1/24 is bad for some reason. too blurry with tracking movements? Or it will not import nicely into FCP? Any thoughts?

Thanks

<{POST_SNAPBACK}>

I just went out to Great Falls last week and shot a bunch of test stuff w/my XL-2. I thought the static shots of the fast moving water (there are falls, rapids and locks) were fabulous in 1/24th. A completely different feel from even 1/48th, let alone faster shutter speeds. The orange grad on the wides might have proven a bit much, however.
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#5 Eric Steelberg ASC

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Posted 29 July 2005 - 10:06 PM

Essentially 1/24 is the same as a 360ยบ shutter, or lack thereof, on a film camera. Lots of motion blur. I wouldn't say NEVER use it...but it is a look doesn't lend itself all situations.
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#6 drew_town

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Posted 29 July 2005 - 10:27 PM

There's no hard line here because different shots can have different degrees of motion. Obviously for a static shot & subject, you're not really going to tell a difference between 1/24th and 1/200th.

<{POST_SNAPBACK}>

You're right, of course. It depends a good deal on what you're shooting. I just use the above numbers as a general guide.
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#7 Alvin Pingol

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Posted 30 July 2005 - 04:40 PM

Watch Collateral for some good examples of what 1/24th shutter speed looks like...
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