Canon 5D2 + 580 EXII

Started May 12, 2011 | Discussions thread
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sacentre
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Canon 5D2 + 580 EXII
May 12, 2011

Can someone suggest what I'm doing wrong here? I have manually set aperture and shutter speed but left the Speedlite on ETTL. (All camera External Speedlite Control settings are default)

With no modifier, the exposure looks ok. If I fit a small soft box onto the flash, the shot is consistently underexposed. I assumed the ETTL would keep the light output constant to give the same exposure for the given Av and Tv settings.

What am I missing?

Trevor

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