Digital BW, The Print

Yes, but way back in ACR v1.0, I would be surprised to see it now; wish I
could remember what file it was.  Try setting noise reduction to zero, and
working space to prophoto for this image as a test.  Sorry, I can’t recall
the details of it; just too long ago.

Best regards,
John Moody

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of Linda J.
Thorsen
Sent: Thursday, September 08, 2005 4:56 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Grids in the file...

I had a "grid pattern" appear in a print on my R2400 today, and was at first
worried
about the printer but soon realized it was just noise in my blue channel.
Not
sure exactly where it came from, but it's there in the file. Has anyone else
noticed this
grid-like posterization in darker areas of the print? (this print happened
to be color, but if I'd
used the blue channel in a B/W results would have been similar).  The
original file was a
Canon D20 Raw capture, imported through ACR as a 16 bit file and then
adjusted minimally
in Photoshop (can't see any real gapping in the levels histograms, though
the bottom part of
the blue channel is a little bit stair-step looking). The image was dark to
start with so this
may just be telling me to make better exposures -- that I'm pushing the
limits of exposure
latitude -- but I'm curious to know if anyone else has seen this particular
phenomoenon or
knows more about it.

Linda






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