I'm still not sure I get it:
It doesn't. TTL flash controls flash exposure by varying the *duration* of the flash, not the power. So... During TTL flash exposure with -1.5 stop compensation, the system will shut off the flash (this happens in milliseconds) when the amount of exposure has reached 1.5 stops less than the meter deems necessary. The *shutter*, however, will remain open for the necessary amount of time for proper, uncompensated, exposure.
I guess my question is, why doesn't the LX + AF280T problem happen, in that the flash doesn't fire at all since the ambient light exposure is so bright that the TTL system thinks enough flash power has been pumped out already? Or wouldn't it fire the flash at the shortest duration possible since the light striking the film from the daylight exposure is already bright enough to satisfy the flash TTL sensor?
Joe --
Joe Wilensky Staff Writer Communication and Marketing Services 1150 Comstock Hall Cornell University Ithaca, NY 14853-2601
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