RE: filmscanners: RE: filmscanners: pushing dynamic range on the nikon 4000ed--What is Analog Gain

["Austin Franklin" <darkroom@ix.netcom.com>]

> Austin writes ...
> regarding:
> > > Unfortunately this isn't what it actually does.  The
> > > "analog gain" actually changes the integration time ...
> > > ...
> >
> > Where did you get the idea (as in a source of information)
> > that exposure time is "analog gain"?  ...
>
>   Here we go arguing symantics again!

Terminology perhaps ;-)

>
>   The Nikonscan software calls it "analog gain", but it adjusts
> the exposure
> time.

Thanks.  Do you have the manual?  Would you mind scanning the page that has
that on it and emailing it to me?  I don't doubt you that it says it, but
it, at least in my book, is really incorrect termonology...probably written
by some tech writer and not proofed by an engineer.  Happens all the time.

> Since there is no "amplifier" per se, the only means of increasing
> the signal is a longer integration time.

I understand what you are saying.

> A longer integration
> time is also
> preferable ... amplification would enhance noise, whereas time
> will average
> the noise and reduce it.

Absolutely, but as I said, it really isn't "gain" in the engineering sense
of the word, but I understand what you (and Nikon) are saying.