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Originally Posted by 95db8
interesting. i might try that sometime.
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well there is a formula on how to determine what your background will appear as. it has to do with comparing your subject to flash and your background to flash.
say that your subject to flash = 12.5 feet
and your background to flash = 22 feet
you have to determine that your feet is compared to you fstops
so say f/12.5 - f/22 = 1 2/3 stops
now say that your background is actually a middle gray value. you would move 1 2/3 stops up the grayscale chart
your wall would appear as a black w/ detail wall.
it's interesting really