Amateur photographer, mostly astrophotography. I think to do the kind of comparison that would be useful, he should have set up a tripod and cradle to keep the ereader positions and camera positions the same for each. Then the lighting would need to be kept consistent. And the focus would need to be the same, preferably with a tiny aperture to keep a larger area in focus. Then he should have tried to display the same text (font, size, etc.) on each reader. In that way we could compare apples to apples rather than apples to every fruit imaginable. Instead he took photos from different angles and focus, of different text, and presented the photos in different sizes. All those differences make it impossible to draw a true conclusion.