The construction of the D800 and D800E optical low pass filter (“anti-aliasing filter” or simply AA filter) is different.
The D800 filter sandwich reduces the effects of moiré and color aliasing at the cost of reduced contrast of fine details.
The D800E filter sandwich maintains the contrast of fine details, with the primary negative effect of color aliasing.
In theory, moiré should be more of a problem with the D800E (MUCH more), but as this was written, field shots do not bear this out to any significant degree.
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