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The D800E
The
D800E is the same camera and has the same sensor as the D800, except that the D800E has its anti-aliasing filter removed. IR and UV rejection are the same.
Nikon simply replaces some of the D800's blurring (anti-alias) filter elements with similar pieces of glass that don't blur, or blur less.
Anti-alias filters are used in almost all cameras to blur sharp edges and points of white light that might hit only one R, G or B sensor just enough so that it hits all three. If a point of light hit only one R, B or B sensor, that white point of light would appear colored.
Anti-alias filters ensure that bright points of light and repeating patterns don't turn funny colors or excite moiré patterns. They blur things very slightly to do this.
The D800E, like the
LEICA M9 and
LEICA M9-P, remove this slight blurring filter to get slightly more pixel-to-pixel sharpness, but at the risk of adding unremovable spurious signals (
aliases) to the image. Aliases cannot be removed in software, although software can try to lessen some of their effects. This is why most cameras use anti-alias filters. Aliasing is an artifact that occurs when trying to sample a signal or image that has frequencies or details finer than the pitch of the pixels or samples.
Removing this filter gives the D800E potential for sharper images with exceptional lenses, and also the potential for irremovable moiré patterns on fabrics, screens, distant fences and fine repeating patterns.
The reason the D800E costs more is simply because Nikon will sell less of them, and because Nikon is playing market segregation by creating the same thing, but charging more for it because they can.
With the regular D800's resolution so high, it will be difficult to find lenses good enough to excite aliases in the first place. It is much more difficult to excite aliases in a sensor with resolution this high than with a lower resolution sensor, which may explain why Nikon didn't offer this option with lower-resolution cameras.
I use a
LEICA M9 with lower resolution than the D800, and use it with
LEICA lenses which are much sharper than NIKKOR lenses, and rarely have any problem with aliasing, so if money doesn't matter, sure, get the
D800E.
I'll be testing both as soon as real, shipping samples are available. Tests or previews of manufacturer-provided (cherry-picked) units only mean that someone is accepting favors from manufacturers, and you know what that does to the truthfulness of those reviews.
Salve a tutto il forum, sto ponderando l'acquisto della D800 ma ne esistono di 2 versioni. Chi mi sa dire le differenze per cio che riguarda se meglio il filtro Low-pass o meno? Visto l'innovativa tecnologica paragonata al medio formato, non se ne conosce ancora la differenza di resa? 
