#4. "RE: D90 - Pictures with incorrect alignment" In response to In response to 2 Thu 23-Aug-12 02:12 PM by Marcial
Yes, the grid has 3 vertical lines and 3 horizontal lines but a friend who also have a Nikon just told me that we can change the number of lines. I didn't try it though.
Now, talking about the perfect level for the camera on a tripod and the bubble, I am not sure if that would resolve the problem. The lens play tricks on us and sometimes we need to place the camera in an odd position (not perfectly leveled) just to compensate the distorsion in the center of the viewfinder, so that at least the lines in the center are vertical and horizontal