Re: [Leica] Archiving Leica photos on CDrom

[Dan Cardish <dcardish@microtec.net>]

At 05:17 PM 11-03-98 -0600, you wrote:
>I have lost the previous emails on this subject but as I recall Eric was
>engaged in a project to scan and save his negatives on cdrom.  I have been
>scanning and saving about 600MB a day (I try to write a whole cdrom a day).
>I am using my Nikon coolscanII at 2700 dpi which gives me a 28 MB file on
>each color neg or slide and a 9MB file on each BW neg.  I am beginning to
>wonder if it is even advantageous to use 2700dpi particularly in light of
>Hewlett Packards comments that anything above 16oodpi is wasted anyway.
>Almost anyone has to be more knowledgable than me on this subject.  Any
>expert thoughts?
>-Neal
>
>
One thing you CAN do is to save your files in PNG format.  This is a 24 bit
lossless format that will save you about 40% on average per image.  Takes
some tome to convert to PNG, but it reads back reasonably quickly, and is
perfect for archiving.  Photoshop supports it, but I use a shareware
program called Graphics Workshop for Windows to the the converting.  

As far as your dpi are concerned, if you are making 8x10 prints from your
files, 1600 dpi is probably sufficient.  But if you ever plan on using your
digital files to write a new negative, or plan on making large prints, you
will want all the dpi you can get.  If I were in your shoes (and I almost
am, I'm using my 2400 dpi HP scanner to archive my own images), I'd stick
with the 2700 dpi value.

Dan C.