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Old 11-03-2007, 11:00 PM   #33
trainboysd40
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Quote:
Originally Posted by JRMDC
Jim, it's cumulative exposure to light that matters. Dark sky can't mask because dark sky does not increase the exposure. If you tried a double exposure and the second image were blue sky instead of night and a moon, you would end up with overexposed blue sky in the final image and a loss of everything in the first exposure.

Put another way, a dark exposure does not paint the negative black! It's the absence of light, not the presence of a black shade of light.
That's what I get for not refreshing after leaving for half an hour!
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