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Old Nov 20, 2006, 5:55 PM   #1
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I currently have a Canon 550 and use it with the 10D and the EOS 1ds. I am not overly pleased with the automatic ETTL exposures. I wind up setting it to overexposure or underexposure most of the time.

Will purchasing the 580 give me better exposures? Is it more accurate in the ETTL mode?
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Old Nov 21, 2006, 6:05 AM   #2
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The ETTL exposure is metered and controlled from the camera... through the lens!
The flash head(s) only respond to commands from the body and do not have their own intelligence :idea:

-> Independent parties such as Metz 54MZ has an alternate mode which could use it's own sensor built-into the flash to control the exposure in Auto mode instead of the camera...
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