Re: D-Max of Scanners
Re: D-Max of Scanners
- Subject: Re: D-Max of Scanners
- From: jim rich <email@hidden>
- Date: Tue, 5 Dec 2000 21:13:29 -0500
Rick,
From your post I think your are right on the money. Here is the rub
about some scanners and dynamic range values. Some vendors use their
own special gray scales to determine their scanners dynamic range and
then market those numbers.I found this out about 4 years about when I
was comparing a Polaroid to a Nikon. When I called up Polaroid and
stated that I was measuring their scanners DR with my set of gray
scales that I had been measuring scanners with since 1980 ( of course
I update them) they said this method would not work and I would
get incorrect density values.
<The other scanner Aztec (PMT) which is modified Howtek 8000, claims
to have a D-Max of
4.0.> Going back to 1994 I measured the density range of the Howtec
4000 and it was 3.8D.
Best Regards
Jim Rich
Rich & Associates, LLC
P.O. Box 70882
Chevy Chase MD 20813
301-652-7266
301-652-8665 fax
email:email@hidden