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Neale,
It doesn't.
You have probably wrong settings...
I was using 16-bit tiff for photometry (like many others) and the accuracy is much better than 0.1m.
Many people claim Autosave.tiff is "better" (because it has wider dynamic range being 32-bit format) but for 400D and its 12-bit ADC this is irrelevant.
BTW, savings with "changes saved but not applied" does mean you haven't done any changes.
The image appearance in DSS with default settings is also considered as "change".. if you do not apply them, the image will appear untouched to other editors.
Last edited by bojan; 17-04-2010 at 07:11 PM.
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