proper shutter speed for 30p

egproductions

egproductions

Veteran
I always thought it was 1/60th 24p is 1/48th but the xl2 has the shutter red light on when i set it to 1/60th and wants it at 1/30th. does this mean 30p is better in low light?
 
Unless you are shooting for the small screne, why are you shooting 30P? Please remember there is nothing you can do with 30P. If you want to blow up to 35m.m.
 
Elvis said:
Please remember there is nothing you can do with 30P.
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Well you can use 30p footage in a 24p timeline and get a perfect small overcrank effect, but otherwise, its not very useful.
 
I didn't really want to discuss the uses of 30p. Just for the record not everybody that is on dvx intends to do a film out. I do event videography work and even my more cinematic work I don't expec to ever reacha film out like 95 other percent of the members of this forum. So if you are such a frame rate expert tell me what the proper shutter speed is?
 
Hey. I think it's 1/60th of a second. 1/48th of a second is for 24p and used by film cameras so that's out. I'm almost positive it's 1/60th, then again, it's been a while...
 
egproductions said:
tell me what the proper shutter speed is?
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Im not sure what you mean by proper shutter speed? It's totally subjective to what look you want to achieve. If I were to shoot 30p material however, all things being equal, and was shooting general footage, I would most likely choose to shoot 1/60th.
 
egproductions said:
So if you are such a frame rate expert tell me what the proper shutter speed is?
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Proper?

Are you assuming that there is a single shutter speed that is "proper" for any given frame rate? If you want a 180 degree equivalent look, then 1/60th of a second would accomplish that at 30 fps, but it isn't the "proper" choice, rather it is one of a number of valid shutter speeds. If you need more light then drop it down as required (but accept that you will have more motion blur as a result of the longer shutter period). If your goal is to minimize motion blur on a fast moving object, you could go for shorter periods (smaller fractional numbers) but accept that you will need more illumination or a more open aperture as a result. Experiment a bit and you will gain an understanding of the effect that each setup choice offers and how they interact with one another.
 
points taken. I gues I was looking for what shutter speed is acceptibly low. It seems like 1/30th is a little to blurred during motion for my taste
 
Film cameras typically use anywhere from a 144-degree shutter on up to as much as 220 degrees. 180 is common, but there is no absolute set speed, as KHMuse explained above.

If you want it to look like film, don't go slower than around 1/40 or so for 24p, or 1/50 for 30P. Any slower than that and the blur will exceed what we typically see on film.
 
I'm interested in a related topic if anyone has any info for me:

I'll be shooting a whole pile of stuff for the web in the coming months. The videos will be exported as FLV, WMV and MOV and will be aimed toward web viewing and podcasting.

Since the web is progressive I am just guessing 30p would be perfect for it - 24p is too "choppy" for what I'm doing.

does anyone have experience on this part of the 30p vs. 24p vs. 60i debate? am I right in my assumptions?

mor10
 
khmuse said:
Proper?
If your goal is to minimize motion blur on a fast moving object, you could go for shorter periods (smaller fractional numbers) but accept that you will need more illumination or a more open aperture as a result.
Click to expand...

This always confuses me when I hear it because I don't know if the person is assuming the person listening is dumb or smart.

You say you could go for "smaller fractional numbers". Does that mean smaller in length? (say, 1/24 of a second) or smaller as in literally a smaller number (1/1000)? Very confusing if I do say so.
 
A "smaller fractional number" has the same meaning as any other way of representing a number (decimal for an example) it is a "smaller number":

1/50 is less (smaller) than 1/25

and

.02 is less (smaller) than .04

I do agree, the use of a fractional system can lead to some confusion. I Hope this helps to clear it up.
 
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