Appendix to Dirty Scanner Optics article:
Scan from slide

Not only didn't old HP Photosmart film scanner see well into shadows, but it also often produced grid pattern in dark tones. The origin of the pattern was probably interference in the scanner electronics.

With negatives, the pattern showed up in light tones, i.e. most often in the sky.

This image was taken from thread (I had similar results on two other samples of HP Photosmart, too).

Vadim Makarov
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