[filmscanners] Re: the histogram in Nikonscan

["Ed Verkaik" <verkaik@sympatico.ca>]

I sent in a post about using Nikonscan last week (part copied below) with no
responses.  Can someone please enlighten me as to the usefulness of the two
sliders on the left side of the curves window?  For what kinds of situations or
problems would you resort to using them?

Also, anyone know a web resource that looks at these adjustments in a practical
way, describing when to use them and what the risks are? All the articles I've
read are too technical and rarely touch on "why" "why not" or "when" to apply
the various histogram functions.

Thanks.
Ed Verkaik

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Today I was playing around in the Nikonscan Curves histogram and toyed with the
two sliders on the left side. I noticed that on a photo with bright sky and dark
ground, you can move the lower slider up to add light to the ground, more
effectively than bending the curve.  But I do not know what those two sliders do
or should be used for.  Can anyone explain in non-technical terms what effect
(practical examples) using either of those sliders has and when they should be
used over any other methods? Are there risks?  (Please don't tell me to go
master PS... I like using Nikonscan for this.  :-) )
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