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Old Mar 11, 2005, 7:50 PM   #1
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Quick question.What is TTL on a external flash

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Old Mar 11, 2005, 9:21 PM   #2
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Quick answer.

Courtesy of, http://myolympus.org/4040/TTL_Principles.html

With TTL flash the camera measures the intensity of flash light (illumination) falling on the CCD and integrates it over elapsed time until a predefined threshold light energy is reached. At that time the camera quenches the flash output and exposure is terminated.


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