We have to scan a 35mm slide with a sample rate of 2042 samples per inch to get an image file that will look sharp fully enlarged on a 15" Retina display. A 35mm slide has a size of of 36mm x 24mm or 1.4173228 x 1 inch. And on a large 27" display they are really a sad sight.Ī quick calculation. Now I have to scan most of the slides all over again, because the 1200 pixels barely suffice for the Retina display of my 15" MBPr with 2880 x1800 pixels. When I started scanning my slides twenty years ago, I thought a pixel size of 1200 pixels at the longest edge would suffice on any display. The scanned photos should be looking good in a slideshow on the display of your Mac you will be using ten years from now. For prints it is fine, but I do not scan to create prints but to view the photos in a slideshow on a computer. I'd really go for more than 600 samples per inch for the scanner resolution.
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