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Thread: Inverse Square Law and Guide Numbers

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10-10-2009, 11:45pm #1
Kym

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Inverse Square Law and Guide Numbers

Explains it all very simply...

http://www.slrgeek.com/geek-speak-ph...quare-law.html

regards, Kym Gallery Honest & Direct Constructive Critique Appreciated! ©
Digital & film, Bits of glass covering 10mm to 500mm, and other stuff
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