Re: [OM] Digital Noise

[Chuck Norcutt]

I thought of glass plates shortly after I wrote that and after you 
replied I wondered if glass plates are still in use for special 
applications.  It turns out they are still used in holography.  From Wiki:
"The manufacture of photographic plates has been discontinued by Kodak, 
Agfa and other widely-known traditional makers. Eastern European sources 
have subsequently catered to the minimal remaining demand, practically 
all of it for use in holography, which requires a recording medium with 
a large surface area and a submicroscopic level of resolution that 
currently (2014) available electronic image sensors cannot provide. In 
the realm of traditional photography, a small number of historical 
process enthusiasts make their own wet or dry plates from raw materials 
and use them in vintage large-format cameras."
Chuck Norcutt


On 9/23/2015 9:25 AM, philippe.amard wrote:
> Le 23 sept. 15 à 14:54, Chuck Norcutt a écrit :
>
> > Both are subject to Schott noise.  What you considered a "twisted
> > (slightly)" presentation had no effect on me at all.  I think I
> > understand his use of "image sensor" as something that retains the
> > image on its surface as does film.  That implies, of course, that
> > there are other forms of chemical based "image sensor" other than
> > film.  I don't know of any
> Light sensitive (glass) plates are another instance
>
> http://tinyurl.com/pj7j79j
>
> Ph
>
>
> > but it doesn't bother me that I don't.
> >
> > Chuck Norcutt
> >
> >
> > On 9/23/2015 1:16 AM, ChrisB wrote:
> > > Thanks, Chuck.  Now he has lost me: I noticed a couple of other
> > > idiosyncrasies of language and ignored them, but to call film an
> > > “image sensor” as if there were some physical similarity between film
> > > and a chip and I lose interest.
> > --
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