Sorry for all the abbreviations and acronyms--trying to save a few key
strokes at work, doing more than I should at one time.
FM with the link provided obviously is the fredmiranda forum.
I did relocate another example of similar testing for the rightfully
skeptical Chuck:
http://www.northlight-images.co.uk/article_pages/cameras/canon_1ds3_noise.html
I wonder how other manufacturers handle the fractional stop ISO
adjustment. Not sure I would wish to use them until it was clear they
did not use the same apparently flawed strategy.
Mike FSA Gordon ("full stop adjuster" for those w/o the unabridged
abbreviation key)
But for all the chatter there it doesn't seem as though anyone else has
tried to empirically verify the claim. I guess I'm not worried about
it
though. I don't think I've ever (deliberately at least) taken a shot
at some intermediate ISO level. I change ISO in full stop incremements
and do any exposure diddling with aperture or shutter speed. Changing
ISO is too fiddly on a 5D (or an A1) to bother with 1/3 stop
adjustments.
Chuck Norcutt
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