Just posted: Nikon D800E samples and analysis added to D800 review

Started Jun 12, 2012 | Discussions thread
Joseph S Wisniewski
Forum ProPosts: 33,871Gear list
About the AA filter...
In reply to Barney Britton, Jun 12, 2012

Thanks for the update.

Something you might find useful about the AA filter.

This seems like an odd way of doing things; why not just remove the filter altogether?

Because it's glued to the sensor chip package.

One of the two LiNbO3 filters serves as the sensor cover glass, it's not part of the stack. So, the only way to remove it is to make a change on the chip manufacturing line, which means new part numbers, validation, etc. for sensor and circuit board.

Altering the second LiNbO3 filter, the one in the stack, is much easier. You don't have to change as much stuff, stock two kinds of chip, rerun validation, etc.

It's something that Canon started doing in the 5D, and it that type of construction spread across most manufacturers and models. It makes for a thinner stack, one piece (the original, clear sensor cover glass) goes away, and thinner stacks mean less spherical aberration.

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Rahon Klavanian 1912-2008.

Armenian genocide survivor, amazing cook, scrabble master, and loving grandmother. You will be missed.

Ciao! Joseph


 Joseph S Wisniewski's gear list:Joseph S Wisniewski's gear list
Canon PowerShot S100 (2000) Canon PowerShot S400 Canon EOS 5D Mark II Nikon D90 Nikon D2X +38 more
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