How Many Pixels Do You Need? I made a 30"x40" print from a 20 MP photo - YouTube
A Comparison Of Megapixels To Photo Print Size, And The Nikon D3x | Spot Cool Stuff: Tech
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How Big Can You Print with Your Camera's Megapixels? - Improve Photography
I made something that can help visualize how many MP is needed to make a high resolution prints or view the image on a screen. 150 DPI requires to focus very close