Re: Why is Silverfast better?

[CDTobie@aol.com]

In a message dated 1/9/00 3:23:20 PM, smthopr@loop.com writes:

>My nikon film scanner allows for manual exposure
>adjustment to change scan density or color cast.
>Even in high bit mode.  This scanner needs to do
>an auto exposure pass before preview anyway to get
>good results.  The "analog gain" allows one to
>tweak this if necessary. However each frame gets
>it's own exposure, not a standard one.  This makes
>sense as the scanner cannot capture the entire
>dynamic range of the film itself.  So it tries to
>find the "best range" to scan.

Specialized film scanners (and drumm scanners) do indeed attempt to capture 
the appropriate d-range, making them difficult to use with ICC profiles, 
unless it is though special application by the scanner software, to account 
for this. Generally table based conversions are used instead. I was referring 
to flat bed scanners.
>
>Even the scanwizard software for my micortek
>flatbed allows manual change in exposure before
>the actual scan.  I agree that moving these
>adjustments from the defaults would make it hard
>to profile.

I'm not sure we are discussing the same thing here; this is most likely a 
setting used to convert the raw scan to the final scan, not an analog 
adjustment to the hardware.

C. David Tobie
Design Cooperative
CDTobie@designcoop.com
-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.