for printing (i work in a print shop with digital images and digital
output all damn day) on a 4-color press, they should be scanned at about
600 dpi, which makes the files huge.  high-quality jpegs or tiffs work
best.  for color laser printing (cheaper, considerably) 150 dpi jpegs
work just fine.  be sure to have the jpegs at 100% of the input size,
unless you have good scanning software.  in that case, you can hit a
target size at a target dpi (i.e., turn a 3.5x5 @ 150 dpi photo into a
7x10 [full half-calendar] at 150 dpi).

if it is just for screen viewing, 72 dpi is all you need.

bill

  On Tuesday, February 12, 2002, at 11:45 , Malcolm Stebbins wrote:

> I'd LOVE to submit some of my photos for a calendar.  BUT, can
> you enlighten us on the best DPI for scanning photos so that they
> are not UN-necessarily big files?  Is 100 DPI good enough for
> computer screens?  in what format???  JPEG (High-Med-Low
> quality)????  Malcolm
>
> On 12 Feb 2002 at 8:16, Vanagon in Seattle wrote:
>
>> If you all would like to mail me the photos, I would be more than
>> happy to place them at the following URL:
>>
>> http://www.speakeasy.org/~vanagon
>