Then I think I'll stick with DPReview's results since they measure the
same way I do, with camera and meter. I think I'd call measurements of
the sensor that don't include the camera as, well... distinctly useless.
Last I knew it was extraordinarily difficult to take photos using only
the sensor. :-)
Chuck Norcutt
usher99@xxxxxxx wrote:
> Chuck's comments got my attention and I had a few minutes to poke
> around. It appears DXO tries to eliminate any camera processing out of
> there assessment of ISO where as DPrev used the camera and compared the
> exposure to a Sekonic meter--middle grey matched. I wonder if some
> gain is introduced somewhere resulting in the difference. DXO also
> agrees with the Moose Conjecture that the ISO dial is very possibly
> linked to some manufacturers leaving in some headroom as not to clip
> highlights.---see below.
>
>
>
> http://www.dxomark.com/index.php/eng/Technologies/Measurement-definitions/ISO-Sensitivity
>
> DXO gives some info on their protocol---much different than DPrev and
> uses LED's. I'm clearly missing some imp't points and nuances. Not
> sure which is more useful. Before I attempt any more thought on the
> matter, will go and get about 16 oz of strong Melior coffee.
> Mike
>
>
>
> http://www.dxomark.com/index.php/eng/Technologies/Testing-protocols/ISO-Sensitivity-protocol
>
>
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