"E" for "extra sharp"?

The D800E is identical to the D800, save for the different configuration of the sensor's low-pass filter. It's designed to bypass the filter's antialiasing properties and thus produce sharper raw images. Then you have to process the photo in software to remove the artifacts the filter normally takes care of.

Like the D4, the right shoulder features a more dramatic slope than previous models, and the front dial is tilted upward for easier operation--my finger has always gotten a little caught on that red swoosh.