Nick Makris (nick@mcn.org)
Thu, 11 Nov 1999 07:22:58 -0800
Hello again,
Recently was setting up a Lightjet 5000 test for printing my digital negs -
my goal was to be able to compare the best I was able to create from the
desktop with what I understand is the best available today (6000 lpi). The
images seem to be satisfactory (or quite good) on the Epson 1520. But I
want to see the difference. Soooooo....
In the process of choosing the resolution for the composite image which is
24X24, with 8 images of various sizes, including a step wedge and the Adobe
Ole No Moire image, I decided on 400SPI/DPI. It wasn't until later
(naturally) that I discovered that this departure from my own digital
negative procedures (which specifies 360DPI for the Epson 1440 dpi printers)
caused posterization in the darkest of areas on a positive print. As you
may know from previous posts, Epson techs have stated that if you send an
image greater than 360 to a 1440DPI printer, the printer will interpolate.
I have never heard the actual rational for how this works, but I suspect
that it has to do with 1444 divided by 4 (colors). For the record, the same
image previously printed properly in the particular area of the sky.
I haven't had time to tinker with these assumptions. If you have any input
on this, I'd like to hear.
Many thanks,
Nick
This archive was generated by hypermail 2.0b3 on Sun Dec 05 1999 - 17:09:24