The top and bottom are cropped off.
You can see the white paper being reflected at the bottom of the panels. This makes the illumination uneven. The background is also not very well done.
The panels are not flat. It is impossible to make it flat while standing up without some kind of support. This makes the shot to a casual one -- it cannot be used to compare the panels, since they are of different shapes and sizes. For a casual shot, the only concern is depth-of-field (DOF).
I took this photo twice. The first time, the first disc wasn't inside. :-P
Lens Minolta AF 50mm f/1.4. Aperture f/8. Shutter speed 1/8. 2-sec MLU. On tripod.