Digital BW, The Print

>  If you convert to monochrome in the channel mixer the three different
> channels WILL look different. 



channel mixer isn't involved if one is scanning silver B&W...



I don't know if you used
> to shoot with different b&w films years ago but if you compared the
> same shot of a colourful subjecttaken with Tri-X and say Plus X they
> were very different as the films reacted to different colours
differently.

Not in my experience or for practical purposes (that's what B&W
filters are for), but it'd be interesting to confirm. It's technically
true that different panchromatic B&W films have different spectral
responses but I don't think it's relevant for practical purposes.

I shoot silver film now, have since 1951 (I was 8). All readily
available films but Verichrome Pan and Kodalith, and perhaps some
technical films, have been fully "panchromatic." 

> I personally don't use the Mixer method to convert to B&W but use
the Lab method and prefer those results. The method is explained on
theweb if you do a search. Try it and see what you think. It is good
and much better than Desaturate.
> Jules

Neither Channel mixer nor Desaturate are relevant as Bruce Watson is
scanning Tri X. They would be relevant if he was shooting color film
for B&W. 


> 
>  
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Bruce Watson
> <bwyg@> wrote:
> >
> > howg2211 wrote:
> > > I am just starting to try my hand at black and white digital imaging
> > > and am actually starting with a Holga and a pinhole camera using
Kodak
> > > Tri-X.  I