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Old Nov 21, 2006, 8:57 AM   #2
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Join Date: Jun 2002
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The increase brightness comes from slower shutter speed and or larger aperture...

Ditto with external flash, the increase exposure could also come from shutter/aperture alone or from the flash depending on how you biais the two (as a fill or as a full-flash)
-> If the increase brightness come mainly from the flash then the flash's battery will be used (if it's the built-in flash then the camera's battery will provide more juice)
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