[filmscanners] RE: over resolving scans

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

Austine,

Thanks for your response.  I did not really mean to imply that it was a bad
thing.  Your point about color slide films not having a film base is a good
one.  After a reply to one of my posts by Anthony, I realized that I was
looking at an old data bood which gave data for old versions of Kodak only
films.  I also realized that I had not really looked closely at the graphs
for color films - particularly transparency films which did run from density
ranges of 3.2 to 3.6.

Given your comments and reflecting on my quick referencing of the data I did
look at, I now realize that I may have been thinking in terms of tonal
ranges rather than density ranges so you first comment in this reply is
appropriate.  I think I need to slow down and smell the roses; I have too
many things on my mind and am not giving any of them my full attention.

-----Original Message-----
From: filmscanners_owner@halftone.co.uk
[mailto:filmscanners_owner@halftone.co.uk]On Behalf Of Austin Franklin
Sent: Wednesday, October 09, 2002 9:29 PM
To: laurie@advancenet.net
Subject: [filmscanners] RE: over resolving scans


Hi Laurie,

> My question to you is if 2 is a low density range in terms of films,

That's not a bad thing, BTW...  It doesn't mean it doesn't have more "tonal
resolution" than films with a higher density range.  In general, color
negative film has more distinguishable tones than color reversal film.

> 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?

Some color slide films for a very simple reason.  They have no film base,
the image data goes from "film" clear to "image" black.

> I am not
> even sure that slide films developed in E-6 under ordinary conditions
> achieve a density rang of 3 or better.

Ektachrome 64 is around 3.6, and Kodachrome is up around 3.6 if I remember
right.  It appears the slower films have the higher density ranges...

Regards,

Austin

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