[Walt Fricke]

Graham - some of the scopes which claim a 2 megapixel camera list the 640x480 VGA resolution for small screens like Androids, and a much larger one (varies) for laptops and above.

If a screen only has so many pixels, maybe its resolution simply can't be any better than that? So it just ignores the extra ones?

There can be some tricky advertising - I found one which showed a second, larger, resolution, but added "interpolated." I take that to mean the graphics program can just use the same camera pixel twice, so there really isn't any improvement in the picture? Made me wonder if others were not so careful. You can get one of these for $5!