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-   -   TTL (https://forums.steves-digicams.com/general-discussion-11/ttl-48992/)

bassfisherman Mar 11, 2005 8:50 PM

Hey

Quick question.What is TTL on a external flash

Thanks Brett:cool:

Stevekin Mar 11, 2005 10:21 PM

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.




Stevekin.





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