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What's the difference between setting the flash on TTL versus ETTL?

Started Aug 2, 2012 | Discussions thread
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Sailor Blue
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Re: What's the difference between setting the flash on TTL versus ETTL?
In reply to yehudakgtbnet, Aug 3, 2012

With some newer lenses ETTL II not only sets the exposure based upon the pre-flash but also on the focus distance. Older lenses don't report the focus distance back to the camera so ETTL-II reverts back to simple ETTL. Supposedly ETTL-II increases the accuracy of the exposure.

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