Re: Step Wedge

I kind of like a combination. Using a step wedge can give a "quantifiable"
representation of the film characteristics. A well known "real life"
subject can give the "emotional" representation. I recall seeing an example
where someone had a standard test diorama for film testing. I don't do
enough film testing to invest in another piece of clutter in my life, or I
would make one of my own. Eventually, one can read the step wedge, and get
a feel for its relation to real life.

The step wedge doesn't have to represent reality, just reliably predict it.
Kind of like exit poling before a national election :-o

Martin Angerman
----- Original Message -----
From: "Sandy King" <sanking@clemson.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, November 10, 2004 9:14 PM
Subject: Re: Step Wedge

> Etienne wrote:
>
> >
> >Precisely because flare renders curves determined in a no-flare
environment
> >meaningless in real life, one needs to test film in the camera, exposing
> >through the lens, in order to have any real idea what tonal values you
are
> >going to get in the shadows when you expose film in the real world.
>
>
> And there is the crux. We determine to test either, a) the material,
> or b) the material given certain parameters, i.e. "in real life."
>
> But, since "in reality" there is no "real life", other than multiple
> options from which we choose *one*, "what do we test?
>
> Testing film in the camera seem intuitively correct, and it works
> reasonably well in practice, but for comparing EFS and CI with
> different films this method is for all practical purposes useless.
>
>
> Sandy
>
>
>
>
>
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>
Received on Wed Nov 10 23:37:02 2004