« on: February 02, 2015, 01:55:49 AM »
why did Nikon go from the D800 to D810 and drop the version of their camera *with* the AA filter
because marketing nonsense
My best guess is b/c if they'd decided they wanted a non-AA version, they decided to prioritize that. And it's better to remove the filter altogether than to have a canceling filter. At that point, it's more difficult to produce versions with and entirely without an AA filter, as the filter stack thickness changes, which means there'd be additional considerations in manufacturing and assembly.
This is my best guess as to why, for any particular model, companies don't introduce a model with, and without, an AA filter... instead they introduce one with a canceling filter.
In this implementation, the filter stack thickness remains the same. The AA version has two lowpass filters, one that 'separates' the image in a horizontal direction, and the other in the vertical direction. The AA canceling version has one that separates in the vertical direction, and one that combines in the vertical direction.
I may be wrong, that's just my guess. Anyone know any different?