Re: [APML] scanner as densitometer

[Radu Corlan <rcorlan@pcnet.ro>]

A way to use any scanner to asses the differences in negatives is to
cut strips from the film and assemble them as one 'frame'. Add
a clear space and a opaque strip, and you will get all the transparency
data in just one frame - so you are sure the settings of the scanner are
the same. Just make sure the gamma is turned off on the scanner.

Radu

On Wed, 5 Jun 2002, Dale Ireland wrote:

> hello
> I have some rolls of Royal Gold 200 that took a long trip to Australia and
> back, through airport security checked luggage, one through carry on x-ray,
> one in a lead bag, and one little piggy stayed home. The film was unexposed
> and after development there are some very slight differences that can be
> seen when the strips are laid out on a light table. I would like to quantify
> the results and I am wondering if there is a way to use my Sprintscan 4000
> as a densitometer.
> If I take raw scan would the scanner's calibration routine overwhelm and
> confuse any differences in the essentially "clear" negatives or preserve the
> very slight fogging so I could get a reading in Photoshop that would have
> any meaning? Any suggestions?
> Dale
> 
> 
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