On Tue, 22 Jun 2004 11:49:28 -0700 (PDT), Dave
<davids1955.DeleteThis@earthlink.net> wrote:
>My mom has about 5000 slides we would like to burn onto CDs or DVDs. She
>is buying a new computer so what specifications and software does she
>need for this? We realize we will have to get a specialized scanner for
>all the slides but we also need to know how many slides will fit on a CD
>and on a DVD. Any help will be appreciated
I see you've had quite a few answers. "To me" some make sense and
some don't.
First I'm going to suggest reading "Scanning Slides" at
<a style='text-decoration: underline;' href="http://www.rogerhalstead.com/scanning.htm" target="_blank">http://www.rogerhalstead.com/scanning.htm</a>
Almost everyone (but not quite) has said "It all depends" and it does.
If you want to view them on a TV set the *required* resolution is far
less than being displayed on a computer monitor.
Remember a TV set only has about 525 lines so the resolution is
roughly 525 by maybe 640. My monitor is 1280 X 1024.. That is
comparing 336K pixels against 1,310,000, or 1.3 mega pixels. That
means the resolution required for a TV set is only a quarter of what
is required for my monitor...Unless going for HDTV and I don't know of
any way to record those signals yet.
So, I would expect far less required resolution for the TV set than
for say making an 8 X 10 print.
My experience has been when using JPGs for a full screen shot on the
monitor the files size in on the order of 250 to 300K which is a bit
smaller than some see. TV size images are usually less than 150K as
JPGs with little compression..
Again, IF you are only planning on displaying the images on the TV set
you can easily use JPG files and even inexpensive scanners will do the
job quite quickly.
As 35 mm slides are basically an inch by an inch and a half you only
need a scanning resolution of 640 X 1.5 or 960 dpi. That ain't much.
As has already been mentioned, 5000 slides are a lot of scanning even
at the lower resolutions.
I use a Nikon LS5000 ED with the SF210 bulk feeder. That means I have
as much invested in my copy equipment as many have in their camera set
ups. Compared to the point and shoot it's a lot more and I'm not
counting the soft ware. However, the system will scan a slide roughly
every 20 to 30 seconds. (IF THE SLIDES ARE CLEAN) and if the slides
require no additional manipulation. Adding scratch and dust
elimination (Digital ICE which adds a hardware requirement to the
scanner), or reduction can easily double the scan time. Adding color
correction for faded slides as well as grain elimination which
shouldn't be necessary at the low resolutions can easily take the scan
time past 3 minutes.
In my case I scan at 4000 dpi which gives an uncropped file of 64 megs
at 8 bit color depth and roughly 128 megs at 16 bits. That also takes
a lot of computing horse power. I only use the 8 bit depth as most of
my soft ware doesn't work with 16 bit files. Still, that takes a lot
of computing horsepower. I'm running a 2.8 Gig XP Plus Athlon with
one Gig of RAM. The hard drives on it are 200 and 180 Gig. I back up
over a network to another computer similarly equipped, But my files
are large, but unless you decide to archive the slides and again it's
already been mentioned the life of the slides may be as much as the
DVDs, there is no need for such a high resolution.
Unfortunately it can take a lot of time to do that scanning even with
a bulk feeder. and the DVD or CD isn't nearly as flexible as the
slides themselves. BUT, IF you store the slides in chronological
order as well as in categories, it only takes a minute or two to burn
a CD and you can share CDs without worrying about the slides,
particularly when CDs are now about 25 cents or less each.
Sooo... Even if you do scan at a higher resolution and save as JPGs
it's unlikely you will need more than a meg or two for each image.
That means even at 3 megs you will get nearly 250 images on a CD.
AT 500 K it will be over 1200.
So, good luck
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
<a style='text-decoration: underline;' href="http://www.rogerhalstead.com" target="_blank">www.rogerhalstead.com</a><!-- ~MESSAGE_AFTER~ -->
>> Stay informed about: Scanning and burniing 35MM Slides onto CDs or DVDs