ballpark resizing

[catherinevankempen]

<p>Hello all,</p>

<p>Here's my question, and I know a lot of you will sigh when you read it, but please help me out here.</p>

<p>I recently bought a scanner and am somewhat confused.</p>

<p>When scanning a B&W negative I have the resolution set to 6400 dpi and I am scanning the same size as the source, in this case a 35mm neg.</p>

<p>I am trying to figure out what my print sizes are ...  I seem to remember something about halfing the res each time you double the print size.  So ...</p>

<p>1.38x0.83 @ 6400<br>

2.80x1.6 @ 3200<br>

5.6x3.2 @ 1600<br>

11.2x6.4 @ 800<br>

22.4x12.8 @ 400</p>

<p>That seems awefully big to me ...</p>

<p>Any ideas,<br>

Thanks,<br>

Catherine</p>

[evan_goulet]

<p>You are in the ballpark.   Just multiply your negative width (1.38) x resolution (6400) to get the total number of pixels on the long edge of the image.  Then divide that total number (8832) by your desired printing resolution to get the print size along that particular edge (22.1", in the case of a 400 dpi printing resolution).<br>

If printing up to 8 x 10, I typically don't scan beyond 2400 ppi at the native size.</p>

[catherinevankempen]

<p>Thank you.  That's a big help!</p>