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how to expose acros in the moonlight...

chris77

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topic says it all, maybe somebody has experience and is willing to share.
can someone give an idea of how long to expose acros (for condenser) under full moon light.
i know it all depends - but i am just looking for a rough figure as a starting point.

thanks, very much appreciated..
 
The "rule" seems to be 18 more stops than Sunny 16. That's your baseline. Then you need to consider reciprocity failure -- something Acros is known to handle better than other films, but even it has its limitations.
 
well, if you know the luminance of the moon , you can work out exactly what your exposure should be, a la The Blessed Ansel*






*p.127 of The Negative in the 1984 NYGS edition
 
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