Digital BW, The Print

You jsut answered your won question. The IR and UV are outside the 
frequency response of the R, G, B filters. Same for the light passed 
through a narrow band yellow filter. If you are happy with what you are 
getting - that's cool, but understand what you are getting and not getting.

Truman

Tom Baker wrote:

> You missed one.  You said "You can't get infrared B&W from any
> conversion of RGB, nor can you get UV from RGB conversion.  The reason 
> for this is the same as indicated above."  You also can only get a 
> real polorized effect in the camera.  But, your narrow band yellow 
> filter is just talk.  Can we see an example?
>
>
>
> Tom Baker