Enlarging for printing

jorgestride

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Hello,

My problem may have a relatively simple answer, but I am facing some issues with enlarging my images to the size I wish to print.

I have scanned some medium format prints at 6400x9000 dpi and have merged the scans together to create landscape panoramas. The I have touched up the images with Photoshop CS5 keeping the resolution at 6400 DPI throughout my tweaking. I now wish to enlarge the images to around 28 x 44 inches and the file size is shooting up from 6GB to over 100GB, which I cannot currently handle on my Mac.

I was wondering if there was any alternative to enlarging these images without the significant increase to data size?

Many thanks.
 
For printing you only need 300Dpi. 6400Dpi is way over the top. For a 28 x44 print you need 8400 x 13200 pixels.
 
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