In a message dated 99-01-13 11:06:19 EST, you write:
<< Tilting the card slightly (and it's always a "by guess and by golly"
operation) *may* produce a value which is closer to 18 0rey integrated across
the range of planes which the true subject (rather than the card) presents to
the taking lens.
>>
The perfect gray card would be a flocked card with gray flocks on a gray
background. I've never seen one. I hereby donate this invention to the
Olympus group.
Warren Kato
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