Inverse Square Law and Guide Numbers [Archive] - AusPhotography:: Australia's Premier Photography Forum::

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Kym

10-10-2009, 9:45pm

Explains it all very simply...

http://www.slrgeek.com/geek-speak-photography-blog/141-geek-speak-photography-blog/692-flash-photography-and-pwning-the-inverse-square-law.html

NikonNellie

11-10-2009, 11:36am

Thanks Kym - just starting out in flash photography and will find this blog very helpful.