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Originally Posted by robski
This filter is to overcome moire patterning. If a pattern in the subject image is close to the pitch of the sensors pixels it will product a beat pattern. I don't know if you remember the days of news readers on the TV wearing check jackets and ties ? If the camera caught it right it would give a jazzy effect. The technical reason for this was down to the quaility of a notch filter in the TV set. The video frequency produced by the jacket matched that of the sub-carrier radio frequency the colour was modulated to. It amasing the stuff you never forget - LOL
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Rob,
I would guess that in 2002 and Canons position in the market, I think D10, Nikon may have been very cautious. Seen all this stuff on D200 banding going on now.
As for the jazzy effect I think Micheal Fish springs to mind.
Following my last post referring to Stephen's experience ( with 2 Stephens here perhaps I will have to refer to him as
FOXY BOB 
) I have just downloaded Corels Raw Shooter. Tomorrow I will give that a go and if it works I can compare 2 different RAW converters side by side. Going back to Foxy Bob's experience I think Bibble had an effect on colour as well as the 1/3 difference.
I feel am going to learn a lot through this thread. Thanks for the explanation.
Don