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Stop Motion - Exposure Compensation


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#1 Bryce Fortner

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Posted 15 March 2007 - 04:14 PM

Hello,

I'm shooting some stop motion tomorrow on an older Eclair ACL. The camera's motor has been modified for stop motion and holds one frame for 3/8 of a second. I've been trying to do the math in my head, but was curious if anyone here had an idea of how I should compensate my meter to get the proper exposure... I appreciate any advice.

Thanks!
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#2 Michael Nash

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Posted 15 March 2007 - 04:51 PM

If my math is right that's equivalent to 1.33 fps. Set your meter to 1fps and close down 1/3 stop, or else find an ASA & frame rate combination that gives you that number. But this is only theory -- test!
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#3 Bryce Fortner

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Posted 15 March 2007 - 05:32 PM

I figured it would be about 5 stops down from 24fps... so that seems right. Thanks for the help!
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#4 Stephen Williams

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Posted 15 March 2007 - 06:03 PM

If my math is right that's equivalent to 1.33 fps. Set your meter to 1fps and close down 1/3 stop, or else find an ASA & frame rate combination that gives you that number. But this is only theory -- test!


Hi,

I would go with 1 FPS or 1/2 second exposure if your meter does not read in FPS. Reciprocity factor starts to rear it's head so slight overexposure is a good thing.

Stephen
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#5 Michael Nash

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Posted 16 March 2007 - 07:43 AM

I would go with 1 FPS or 1/2 second exposure if your meter does not read in FPS. Reciprocity factor starts to rear it's head so slight overexposure is a good thing.


Yes, of course I meant open up one third from 1fps, not close down. Been shooting overnights... :blink:
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