Digital BW, The Print

Thank you Tom.  That clarifies the matter a lot for me. It also
explains why we see no difference on this particular negative in the
1x vs 16x scan with superfine turned on. (I think that means only one
CCD is doing the scan)
 I am doing all scans at 4000, btw.
 Appreciate the help and explanation.
  Ginny


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Tom Baker
<tbaker1328@...> wrote:
>
> Ginny  -
>    
>   Your'e scanning at 1x/16bit or 16x/16bit will produce the same
file size and resolution.  The 1x vs. 16x is just the number of passes
the scanner makes during the scan.  The multiple scan capability is to
help reduce/eliminate noise in the dark areas in the final scan, the
higher the number of passes the less noise.  Multiple passes are only
useful on very dense areas of the film.
>    
>   You will see a difference between 8 bit and 16 bit scans in
gradation.  The amount of detail you capture is a result of the ppi
setting on the scanner, the higher the setting, the more detail you
capture.
>    
>   As far as storage, if quality is of great importance, ALWAYS store
you original scans as 16 bit.  Once you reduce it to 8 bit the data
that is lost on the conversion from 16 bit to 8 bit is forever lost.
>    
>   Tom Baker
> 
> ginnylady33 <ginnylady33@...> wrote:
>     I've been scanning via my 9000 at 16 bits but ultimately burning
> files onto Gold CDs for storage at 8 bit. It saves much space. I'm
> wondering if this is an error in judgment.
> I know from experience that, at times, something that you'd expect to
> be a 'better methodology' may not be. For example, I've done detailed
> testing with my 9000 scanning B&W negs at 1x/16 bit vs 16x/16 bit
> superfine mode. (Which takes forever to scan)
>   Truthfully, there was no discernible difference in the scans at any
> magnification. I was stunned by this and called over a friend who is a
> computer graphics whiz to evaluate the scans without telling him which
> was which. In a nutshell, he could not tell the difference though he
> felt the 1x scan showed a tad more contrast and (!) a tiny bit more
> detail.
>   Makes no sense, huh? Perhaps there'd be more of a difference with
> color scans. (shrug)
>   So, back to my question regarding file storage on CDs at 16 vs. 8 bit.
>   Also, do most of you store in PSD or TIFF format?
>    Thanks
>    Ginny
> 
> 
> 
> 
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