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Aren't these charts intended for analog cameras anyways?

• bradleyland 15y ago
  They're intended to be printed at high-resolution, then captured (photographed) at a distance where the fine lines at the center of the image greatly exceed the resolution capabilities of the capture device (usually a camera). With a film camera, you could test the limits of the lens and film. With a digital camera, you test the limits of the lens and sensor. The regularity of a pixel array in a camera sensor or display results in the Moire pattern you see in these test images.