The Nikon D800E is everything the D800 is but with the anti-aliasing filter removed. The anti-aliasing filter slightly blurs captured images in order to avoid moire, the funky image artifact that arises out of photographing finely patterned textures. Thus, the D800E will capture quite a bit more detail than the D800, a boon to studio or landscape photographers who want to eke out every last drop of resolution from those 36 megapixels (and know what not to shoot to avoid moire). For more information on the D800, look here.