Digital BW, The Print

Peter,

> > Roy,
> > The neutral density filter reduces the entire spectrum to
> > an even level. There is no bloom and smear with the ND
> > filter, and the response is uniform and not peaky, as
> > it is with blue and green.
>
> Whoa!

Whoa your self!

> A neutral density filter does NOT "even out" the spectrum of
> anything.   That's why it's called "neutral" - it passes all
> wavelengths equally.

Yes, that's what I said.  I know how a ND filter works, thanks.  It PRESENTS
(what ever word you want to use) an even spectrum to the CCD, instead of
having colored filters which present basically a band pass in a bell curve
shape to the CCD.

> If something came it peaky blue or green it
> comes out peaky blue or green.

You don't understand.  The peaky blue/green is the CCD response to that
specific color.  With an ND filter, the CCD response is not peaky to any
colors.

Austin