<
ge...@nospamgeoffwood.org> wrote:
> >>>> Having more bits in A/D increases noise.
> >>>
> >>> nope. having more bits increases dynamic range, making noise less of an
> >>> issue.
> >>>
> >>>> Astronomy "cameras" I have seen include a Peltier cell to cool the
> >>>> sensor and reduce thermal noise. Probably more expensive units use
> >>>> liquid CO2 or N2.
> >>>
> >>> that's separate issue and unrelated to bit depth.
> >>
> >> Surely it relates to 'useful' bit depth - the lower the thermal noise,
> >> the greater dynamic range achievable.
> >
> > true, but thermal noise in the sensor is still independent of bit depth
> > of the a/d.
>
> That's a bit of a backwards way of looking at it !