On Thu, 28 Jun 2001 12:36:12 -0400 (EDT)  Raphael Bustin 
([EMAIL PROTECTED]) wrote:

> Gamma adjustments, by definition, don't 
> affect white point or black point -- 
> only the stuff in between.
> 
> I'm sure even Vuescan has a a way to set 
> both of these -- if not, I'd trash it.

It has - the 'image brightness' setting sets both gamma and 
brightness/contrast according to some fiendish Hamrickian scheme. I still 
preferred them as separate parameters, but that's the control to twiddle 
with - in practice it works well - to achieve a scan which does not clip 
either end of the histogram. You'll also want to set VS white point to 
0.01 and black to 0.0.

Like I said, aim for a rather pallid preview scan which exhibits neither 
full blacks nor whites. Use the levels shadow and highlight eyedroppers in 
PS to adjust to taste.

Regards 

Tony Sleep
http://www.halftone.co.uk - Online portfolio & exhibit; + film scanner 
info & comparisons

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