Albano wrote:
> > Somebody knows if ALL cameras and ALL incident meters are calibrated for 13
> > percent? All Asahi cameras or just modern ones? All meters? Gossen?
The real reason for this discrepancy is that way back during
the Anselian Age the Sun actually shone brighter than it does
today, thus the "average scene" back in those idyllic times
did truly measure an 18% reflectance. Some speculate that the
increased industrialization and concurrent smog (obeying Boyle's
Law and dispersing evenly throughout the atmospheric envelope)
density has reduced this reflectance to a mere 13% in recent times.
Friday looming large on the Oregon Coast ..... Bill
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Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
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