Lightroom 4

DCerezo

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Not sure if this is the right place for this post... I'm working with 30mb raw files from my camera. I want to give clients low resolution discs/flash drives that only allow them to print 5x7's. what is the maximum resolution and quality needed to do this in Lr4? Tia.
 

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Resolution is not file size, it's pixel dimensions.

You cannot control the print size, because there is software that can up-res the image files.

What you can do is limit the pixel dimensions, to say 500 x 700 pixels, which is a 7:5 aspect ratio.
However, your camera likely makes images that have a 3:2 aspect ratio, which would be a 5 x 7.5.

Next you need to consider print resolution, or pixels-per-inch (ppi). Your customers can change the ppi of the digital file.
A 500 x 700 px image set to 100 ppi will print as a 5x7 print.
a 500 x 700 px image set to 200 ppi will be a 2.5 x 3.5 print
 

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