ETTL & flash exposure compensation

Started Feb 11, 2013 | Discussions thread
Philip Kendall
Philip Kendall Contributing Member • Posts: 789
Re: ETTL & flash exposure compensation

John Deerfield wrote:

The pre-flash and the "real" flash are milliseconds apart. Virtually undetectable by the human eye.

That's true for 1st curtain sync, but if you use 2nd curtain sync with a long exposure time, it's then really obvious there are two flashes

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