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

Started Aug 2, 2012 | Discussions thread
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Sailor Blue
Sailor Blue Veteran Member • Posts: 9,415
Re: What's the difference between setting the flash on TTL versus ETTL?

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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