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Changing frame rate while rolling with Bolex.


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#1 DavidHawkins

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Posted 31 October 2005 - 01:50 PM

Has anyone ever experienced a camera jam or any adverse effects while changing the frame rate in a Bolex from 24 fps to 48 fps while the camera is rolling?
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#2 Steven Budden

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Posted 01 November 2005 - 04:42 PM

Mechanically it works... I do it all the time, but run some tests becase the exposure will change slightly (or a lot).

Steven
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#3 Chris Keth

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Posted 01 November 2005 - 07:28 PM

B)-->
QUOTE(Steven B @ Nov 1 2005, 04:42 PM) <{POST_SNAPBACK}>

Mechanically it works... I do it all the time, but run some tests becase the exposure will change slightly (or a lot).

Steven
[/quote]


It changes predictable amounts, actually. Changing from 24 to 48 fps will half the shutter speed, so he'll have to open up a stop while he ramps.
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#4 Mike Lary

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Posted 01 November 2005 - 09:43 PM

Has anyone ever experienced a camera jam or any adverse effects while changing the frame rate in a Bolex from 24 fps to 48 fps while the camera is rolling?

I've never had mechanical problems changing frame rates on a running Bolex, but you might get some camera jiggle if the dial doesn't move fluidly when you turn it.
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#5 Steven Budden

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Posted 02 November 2005 - 01:54 PM

Or like many filmmakers did in the sixties, change the frame rate and let the exposure change for effect.

Steven
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