A friend gave me a Kodak viewing filter which I thought would be the Wratten 90 that renders the scene in monotone.
This one seems to be an ND filter. It removes a whole bunch of light from the scene but the colours come through.
The device is a one inch round filter mounted in a light metal ring with handle and neck cord.
One side is labeled "Viewing Filter" and the other one labeled "Compliments of the Eastman Company"
I've rotated as I look through it and nothing seems to change. It is dark grey and seems to add a little purple to the scene.
Anyone have any thoughts as to what the purpose of this filter is?
Regards
E.A. Smith
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