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Old 04-10-2007, 06:27 PM
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jerrymeola jerrymeola is offline
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It shows you how light quickly falls off with distance from a window. The second reading is less than half the light of the first one.

It is about 1600 foot candles at the first reading and about 600 at the second.

It makes me think I need to expand the chart for non-photographers.
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