Digital Image Studio wrote: > On 24/08/07, Toralf Lund <[EMAIL PROTECTED]> wrote: > > >> Isn't the ISO rating (of the sensor) directly linked to the >> signal-to-noise ratio? >> > > Indirectly. > > >> Isn't wanting a lower ISO like wishing the sensor >> was noisier? >> > > No, the sensors effective native ISO has more to do with its > saturation level, the noise floor controls how far you can > artificially raise the effective ISO before the noise becomes > objectionable. > Yes, I know that, but what I was trying to say, is that I think I've read somewhere that the "real" ISO is related more to the signal-to-noise than the saturation level, i.e. that it may be defined as the amount of exposure needed to reach a certain signal-to-noise ratio, or something.
- Toralf -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
