I also wonder if the 'sensitivity' response of a sensor varies with
conditions - is it shifted if the scene is bright or dark, more green
or more blue, etc.
I'm sure that they are working to a standard of some type but an
exhaustive test by a DPReview or DxO may give more real world
numbers. One should remember of course that one is English, the other
French so there is likely to be no agreement whatsoever - a matter of
principle.
Andrew Fildes
afildes@xxxxxxxxxxxxx
On 30/01/2009, at 2:00 PM, Wayne Harridge wrote:
> Is there an actual ISO standard for measuring the "speed" of a
> digital camera ? There is for film, but since the "characteristic
> curve" (from which the film speed is measured) is different for
> film and digital I doubt you can just directly apply the film
> standard to a digital sensor.
--
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