HOUSTON帮一女公民朋友征老公# Piebridge - 鹊桥
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D800E - 'cancellation' of anti-aliasing filter
Nikon uses slightly curious wording about the D800E - that the anti-aliasing
effect of the optical filter stack in front of the sensor is 'cancelled' -
and the diagram below shows what this means (courtesy of Nikon). Anti-
aliasing filters work by using a birefringent material to split light rays
into two based upon the polarization of the light; a first layer splits it
horizontally, the second vertically. The practical result is a slight
blurring of the image, to avoid moiré and aliasing artefacts. In the case
of the D800E, the first filter is instead directly counteracted by the
second, resulting in no overall blurring.
Nikon uses slightly curious wording about the D800E - that the anti-aliasing
effect of the optical filter stack in front of the sensor is 'cancelled' -
and the diagram below shows what this means (courtesy of Nikon). Anti-
aliasing filters work by using a birefringent material to split light rays
into two based upon the polarization of the light; a first layer splits it
horizontally, the second vertically. The practical result is a slight
blurring of the image, to avoid moiré and aliasing artefacts. In the case
of the D800E, the first filter is instead directly counteracted by the
second, resulting in no overall blurring.
