Hello.
I'm trying to find help on this question on got on facebook.
“I have to hear how it can be that if I have a file of 300 dpi as I exporterer in 50% size of original and 72 dpi, so I get a file in cm is bigger than the 300 dpi?
My workflow is as follows: I shoot tethered directly into Aperture, doing color correction, load the file into PS, cropper and edit and save version of Aperture. The cut I saw the clipping in Asia (300 dpi). When it comes back, I pull it into Aperture again to convert to a version for 72 dpi too. Here I choose> Export> Version. Then Edit> 50% of original> 72 dpi> OK> Export. Even making the file to be half again as large in cm, than in 300 dpi. It is not the idea
Hope you can help. Thanks in advance
Brian”
I'm not sure how to answer that. Any help?
If you are reducing dpi from 300 to 72 dpi, you are more than tripling the width and length at the original size in inches (or cm). When you then save at 50% size, you are still larger than the original. For example, 300x200 pixels at 300 dpi would be 300 / 300 = 1 inch and 200 / 300 = .67 inch. Changing that to 72 dpi (no change in pixel dimensions, just dpi), you make it 300 / 72 = 4.167 inch and 200 x 72 = 2.78 inch. Now divide the inches (or cm) by 2 and you get 2.08 x 1.39 inch vs original 1 x 0.67 inch at 300 dpi.
Make sense?
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