[filmscanners] Re: NikonScan negative question (was Dynamicrangequestion)

["" <lists@lazygranch.com>]

The only way to really tell is to look at the commands going to the
scanner. I don't use the Nikon software so I don't know for 100%
certainty if the scanner operation changes with gain. If you can view
the raw scan and see no difference, that would be a good clue.  On the
Artixscan, the only change I found was the "long pass"

Given the illumination scheme used by Nikon, it may be possible that the
LED intensity is changed as you adjust gain. I think for a CCFT, this is
less likely.

Ed Verkaik wrote:

>From: <lists@lazygranch.com>
>Just to reiterate, most of the time you are just altering the post
>procession of the raw scan. That is, more light didn't get through,but
>the raw scan was interpreted differently.
>
>
>
>That isn't true with Gain adjustments, is it?  I thought it causes the scan
>to "delay" over the slide so that the raw data had more actual light in it.
>It certainly takes the scanner longer. I cannot duplicate the result with
>anything I've tried post-processing when a lot of Gain is needed.  Likewise
>(but less effectively), reducing Gain in a burned-out slide will increase
>detail in highlights but it's less useful data because slide film is
>unforgiving when too bright.
>
>Ed Verkaik
>
>
>
>
>

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