[filmscanners] RE: over resolving scans

["Laurie Solomon" <laurie@advancenet.net>]

> > Mr Entlich said:
>
> Er, no.  I said that.

Glad you corrected that Austin. :-) Arthur gets into enough trouble all by
himself without any need of help from you or anyone else. :-)

My question to you is if 2 is a low density range in terms of films, what
films except some specialty films or films processed in special developers
(color or b&W) have density ranges in the area of 3.0 or higher?  I am not
even sure that slide films developed in E-6 under ordinary conditions
achieve a density rang of 3 or better.

> -----Original Message-----
> From: filmscanners_owner@halftone.co.uk
> [mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Austin Franklin
> Sent: Tuesday, October 08, 2002 12:54 PM
> To: laurie@advancenet.net
> Subject: [filmscanners] RE: over resolving scans
>
>
> > Mr Entlich said:
>
> Er, no.  I said that.
>
> > BZZZZZT.  B&W films have very LOW density ranges in the overall
> > spectrum of
> > density ranges of films.  You're lucky if you find a density
> > range of near 2
> > from B&W print film.
> > ===============================
> > This simply is not true: an examination of film
> characteristics in Adams'
> > "The Negative" for example, will show half-a-dozen examples to
> > the contrary.
> > See especially Kodak Plus-X Professional treated with selenium
> > toner.  From
> > the first usable density of 0.3 above Fb+F (Film base +
> Fog) to 2.7 the
> > curve is practically linear.
> >
> >
> > George Harrison
>
> George,
>
> What I said simply IS true, directly from the Kodak data sheets.  Your
> example, first off, is using compensation development (which
> is not what
> most people do) and gives an overall density of 2.4 (2.7 - .3 = 2.4).
> That's still a LOT closer to 2 than it is to 3.6-4.2.
>
> Of course you can find special cases where SOME B&W films CAN
> give extended
> density ranges, but that simply is not the norm.  Notice the
> curve for Tri-X
> Professional Sheet Film shows "Normal" development as being
> right about 2
> (2.1 - .1 = 2).
>
> Do you develop using compensation development?
>
> Austin
>
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