I noticed that my scanner cameras are not in the same focus. I took a white product box and stood it up on the turntable facing squarely at the front of the scanner, with the scanner on the included plastic stand, and the equipment lined up on the transluscent guide sheet. The product box served as a focus plane, and was packed with lines of crisply printed sans serif characters each roughly 2mm high.

The camera nearest the scanner USB port is focused most sharply at the furthest plane along the second-to-outermost ring, while the other camera is most sharply focused at the nearest plane along the same ring. In either plane, the least focused camera sees blurred typeface (you can make out what it reads but it looks terrible).

Is this typical?