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RE: [OM] question

Subject: RE: [OM] question
From: jowilcox <jowilcox@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 13 Feb 2001 11:03:13 -0600
Hi Nicola,

>===== Original Message From "galactica1" <discobolo@xxxxxxxxxxxx> =====
>hi people
>first,a question:reading your posts,i seem i understood that i can use a
>certain film-speed and then force it to another one("pushing"it,if i
>recall)in printing phase;so that's the question:can i do the same with a
>scanner?can i regulate its sensitivity?

Sort of, I think.  I don't know if I would equate anything you might do with a 
scanner to push processing a slide film (pushing takes place in the 
development phase, not in printing), but any scanner software will give you 
the option of locating black and white points and altering the gamma of your 
scan to make it lighter.  The latest versions of VueScan have a very useful 
and simple "image brightness" feature which can significantly raise the 
overall gamma of the scan.  There is a price to pay, as always, in that while 
an underexposed slide can be improved and made reasonably acceptable, there 
may be more noise in dark areas or a flatter rendition of middle values, 
almost like a loss of saturation.  In short, these features should be used 
sparingly and lightly.  There is no substitution for working with accurately 
exposed slides in the first place.

Hope this helps.

Joel W.


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