(1dx) Best way to use flash in Av mode?

Started Aug 18, 2013 | Discussions thread
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keithop
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(1dx) Best way to use flash in Av mode?
Aug 18, 2013

Hi

Apologies if this is a simple (atupid) question but it's confusing me at the moment.

1DX on Av mode. Aperture set to 1.4, fine, 580exII in ettl mode.

Just experimenting indoors to get familiar with the flash system and with the flash direct, all I get are hopelessly over exposed images.

I'd simply have expected the camera to work the shutter speed, iso and flash output to get the exposure reasonably ok but it seems to put the iso at 400, shutter speed not particularly fast (sometimes 1/25) and over expose :/

I've reset all camera settings to make sure I'm not doing something silly so I must be missing something ?

Thanks for any ideas

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