New frame rates: 12P and 15P

[thisiswells]

Sincere Question:
Why would this not work with a slow shutter at 1/15 @ 30Fps or 1/12 @ 24Fps?
That way the "trigger" would actually be pulled only 12 or 15 times per second and you'd get increased sensitivity like originating on film at 12Fps or 15Fps..

It would appear that the CCD's would be operating at 24Hz or 30Hz still, which isn't the same
effect as film shooting at those framerates.... You know what I mean. It's the sensitivity thing.

It seems like even though you would be shooting at 24Hz or 30Hz, a 1/12 or 1/15 shutter
would essentially make up for the difference and then you would speed up in post and have
12Fps or 15Fps, as examples. At least that's what I thought.

I am not that clever.. so I know I am missing somethin here. What is it?

 

[Barry_Green]

dang - y couldnt pal users get two speed options too -was hoping to use 15fps... thx though barry - curiously - did the dvx100 not have the slower shutter speed? looking forward to experimenting with 6.25 and 3.125 experiments...

The original DVX100 does not have the slower shutter speeds, no. 1/24 is the slowest you can get on that camera.

btw are these the kind of things in your dvd/book?

Yep. This whole 12p/15p article is in there.

 

[Barry_Green]

Why would this not work with a slow shutter at 1/15 @ 30Fps or 1/12 @ 24Fps?
That way the "trigger" would actually be pulled only 12 or 15 times per second and you'd get increased sensitivity like originating on film at 12Fps or 15Fps..

It does work. At the time this article was written, I don't think the DVX100A was out yet, and slow shutter speeds weren't an option.

It would appear that the CCD's would be operating at 24Hz or 30Hz still, which isn't the same
effect as film shooting at those framerates.... You know what I mean. It's the sensitivity thing.

Actually it ends up being the exact same thing. The CCDs accumulate exposure past the frame boundaries, so you end up with an exact simulation, motion-wise and exposure-wise, as exposing film at the slower frame rates.

It seems like even though you would be shooting at 24Hz or 30Hz, a 1/12 or 1/15 shutter
would essentially make up for the difference and then you would speed up in post and have
12Fps or 15Fps, as examples. At least that's what I thought.

You are correct, that is how it works.

 

[thisiswells]

Barry,

Thanks.
EDIT: Many Thanks.