Re: Variable viewer Illumination...needed or not?

[P3D Sam Smith <sam@xxxxxxxxxxxx>]

George writes:

>Statement #2:  Variable illumination should *not* be used to compensate 
>for incorrect exposure.
>
>Explanation:  Sure you can do it, but it does not work.  By turning the 
>illumination up in an underexposed slide you will see more details but 
>you will also see grain, the blacks will be washed etc. 

I gotta challenge this one George. Sounds like you're making the assumption
that all slides have the same D-max, or maximum density. They do not. Have
you ever tried to view B&W litho positives or Autochromes? Both may require
much more illumination than the average modern color slide, though it's more
in the nature of materials than improper exposure. Regarding grain, I think
for speaking specifically Realist or small formats, as it is not more
prevalent in medium format.

Sam


Sam
website: http://www.barint.on.ca/~sam/imn23d.htm


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