Digital BW, The Print

Ernst,
I should definitely connect brain before pushing the SEND button. Obviously
you're right, density would be a problem in the highlights, with negative
film, not in the shadows.
If it's not noise, then, I guess that what I see in the image below is
simply grain, possibly grain aliasing. What is your opinion? BTW, I get the
same result also using Epson carrier, without oil mounting.
 
http://www.photo.net/photodb/photo?photo_id=1361306
<http://www.photo.net/photodb/photo?photo_id=1361306> 
 
Alessandro

-----Original Message-----
From: Ernst Dinkla [mailto:E.Dinkla@...]
Sent: mercoledì 12 marzo 2003 20:13
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Epson3200 - Test results




 <snip>
As for point c), I think the assumption is that what we get *is*
noise,  because the film density in deepest shadows is out of the scanner
reach (I   seem to remember that in order to evaluate a scanner's dynamic
range you   indeed check until which density the scanner is capable of
extracting  information generating less than a certain amount of noise). And
therefore,  the proposed solution is to overexpose by 1 or 2 stops, just to
avoid  reaching a critical density. Then again, I'm not 100% positive
that what I  see in my scans is noise... I'll post a small crop for you to
evaluate<

On the Nikon 8000 all negatives fall within the dynamic range but
the 'noise' is just more visible in the shadows with wetmounting.
I changed the exposure of films as well but less drastic: 160 ASA
to 100 for Fuji NPC. Shouldn't noise not be at the other end of
the scale where it can't get detail from the denser part of the
negative and random pixels are created by the CCD and the other
electronic parts involved ?

Ernst




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