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White backdrop?
Old 12-03-2002, 05:11 PM   #1 (permalink)
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How many f-stop differences should there be between the model and white muslin backdrop to make the model stand out and be separated from it? Using 2 AlienBees B800 as fill and main, plus 2 - 90ws backdrop stobes.

Thanks again,

Jay
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Re: White backdrop?
Old 12-03-2002, 08:52 PM   #2 (permalink)
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Jay

The response has as many answers as their are photographers! I use 2 stops to make the model snap away from the backdrop. However, you don't want her too close to the backdrop where the excess light might bleach her out!

Bob



Kendra -- I think there's 2 stops here!
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Re: White backdrop?
Old 12-04-2002, 11:00 AM   #3 (permalink)
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You must put around one to two stops more on the background than what the combination of both your fill and main put onto your subject. Also your subject should be six feet or so in front of the background in order to prevent spill from the background lights affecting the exposure of your subhject. I have three lights aimed at a 45 degree angle up at the joint where the ceiling joins the wall, one in the center and the other two 1/3rd of the way out from it. This will insure adequate coverage all the way across and you shouldn't have any gray areas. When doing full length, make sure the main light strikes not only the subject but also the floor ahead of the subject. That way you will eliminate any shadows caused by the background lights.

Benji
 
 
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