From: Temi (Temi@TemiOriginals.com)
Date: 12/01/02-03:30:56 PM Z
Hi Sandy,
Below are just my thoughts on your question.
When I scan an image to print on my printer, I find that a resolution of
300 ppi gives me a good print. If I plan to print a different size than
my original that I am scanning, then I use a multiplier so that when
enlarged I will have the 300 ppi that gives me a good print.
Example: You are scanning an image 4 x 6 1/2 with the intentions of
printing around 13 x 19. This is approx 300%. Thus I would scan at 900
ppi and thus when enlarged to 13 x 19 it would still be the 300 ppi that
I find gives me a good print.
BUT, there is no final rule because each scanner and/or printer may be
set to do some things automatically.
I would try selecting just a one or two inch section of the image as a
test to see if the results are satisfactory for your purpose. I use this
procedure because I often scan and print on different printers than my
own and this saves on paper and ink.
Temi
-----Original Message-----
From: Sandy King [mailto:sanking@clemson.edu]
Sent: Sunday, December 01, 2002 11:57 AM
To: alt-photo-process-l@sask.usask.ca
Subject: Warning: Digital Question
I have a scanning resolution question.
Situation is this. I am scanning a 4 X 6.5" section of a 5X7" color
negative with the Epson 2450 flatbed scanner, which has optical
resolution of 2400 dpi, using SilverFast scanning software as a
plug-in to PhotoShop. The eventual purpose of the scans is to make
color prints approximately 13X19" in size, or to make negatives for
alternative printing. I understand that a maximum resolution of a
little over 300 dpi at the printing size is needed for either purpose.
My question is this. What are the pros and cons of of the two
following scenarios: 1) scanning at 100% of the 4 X 6.5" negative
size at the maximum optical resolution of 2450 dpi, re-sizing later
in PhotoShop, or 2) scanning at the desired printing size of 13X19"
300dpi?
Sandy King
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