aleksander_kelpman

Oh yes! I wonder if it changed if I switched my units to metric or when did I manage to switch it. Anyhow, thanks a lot, very helpful!

The same thing happens with digital raw file exports as well. http://i.cubeupload.com/m5c4nj.jpg In this example, making a quick calculation, while the pixel size is 1600 x 1067 and ppi is 300, the document size should be 13,55 x 9,03cm. http://www.photokaboom.com/photography/learn/printing/1_calculators.htm Is my software somehow strangely broken? I haven't come across this problem online.

<p>Thank you for the thorough explanation, Andrew.<br /><br />I still wonder WHY the lightroom export module alters the document size in such way that the pixels, doc size and dpi are not in correlation with each other. Why go through a tirade with a photo editor every time you want to send 100dpi files. People tend to be not the most cooperative while working on a tight schedule and their jobs on the line. <br />I've found a reroute using lightroom's print module, but it's a tedious workaround since you need to calculate your file dimensions every time so you wouldn't lose pixel data.</p>

<p>To clarify, it was initially correct at 300dpi. At 1600dpi it was obviously much lower.</p>

<p>A note of interest might be that I scanned the photos at 1600dpi, when I opened them up in photoshop and changed the resolution from 1600 to 300, the document size was initially correct.</p>

<p>Increasing the document size in photoshop from 12cm to 40cm will lower the dpi to 104.<br />Although I've read about the dpi being not set in stone in terms of image quality, I wouldn't<br />like to take my chances. It's a magazine cover and I won't have a chance to make test prints.<br />It's clear for some reason lightroom alters the print dimensions in my scans.</p>

<p>You can't increase the document size (printing dimensions) without sacrificing the dpi.<br />In my current situation I need to print the photos 40cm width at 300dpi.</p>

<p>The size in pixels did remain the same.</p>

I've used photoshop for preparing digital prints before with no problem, <br />but there are some features in lightroom I quite enjoy, so I'd love <br />to overcome an obstacle. Maybe you can help?<br /><br />I import tiff files scanned with silverfast, then do my adjustments and when I export them and then look at image size using photoshop I notice the document size has shrunk over 2/3rds, for example from 40cm width to 12cm width. Resample is unticked, dpi is 300 throughout.