Right resolution for scans?

[ashishvashisht]

Hi everyone!<BR>
Very soon I will be scanning my first ever slide film (yes, yes!) but was wondering what resolution and type of image (TIF or JPEG) should I use for, say:<BR>
1) A 4x6 print so that I don't miss out on updating my photo album.<BR>
2) For a web upload and sharing with friends.<BR>
Thanks!<BR>
Ashish

[roofguy]

If you intend to keep the scan for archival<BR>
purposes, scan it at the highest resolution<BR>
available.<BR>
<BR>
For print output, you need 300dpi.<BR>
For monitor output, you need 70-100 dpi.<BR>
<BR>
Calculate from the size of your film.<BR>
For example, if you are going to crop out<BR>
a 0.5 in by 0.75 inch section of your slide<BR>
and enlarge it to 4x6, you will need to<BR>
scan at at least (4 / .5) * 300dpi = 2400 dpi<BR>
in order to achieve that result.<BR>
<BR>
For full frame (1x1.5 in), it would be <BR>
(4 / 1) * 300 = 1200 dpi.<BR>
<BR>
Most photo software allows you to both <BR>
"downsample" and to "resize", getting whatever<BR>
you want so long as you start with enough.<BR>
They'll allow you to "upsample" too, by<BR>
generating more than you start with, but<BR>
at a cost of lowered quality.