I thought you'd know :-)

B&W is *all* about light and shade.  There's a great deal of
post-exposure manipulation done to create the perfect print;
either in the development stage, or in printing.  Digital
doesn't give you any options at development time - everything
is done by manipulating the response curves.  If you're trying
to pull detail out of the shadows you'll find that the linear
response of a digital sensor means you get quantization effects
rather than a smooth range of grey tones.

You get the same efffect with colour images, of course, but
if there's significant chroma detail the eye will often ignore
the intensity artifacts (just as JPEG artifacts that are very
apparent in smoothly-shaded areas are hard to spot in areas
where image detail is changing rapidly and unpredictably).


Shel Belinkoff mused:
> 
> Why is that?  (esp for B&W)
> 
> being a B&W shooter, that sort of thing really is of interest.
> 
> Shel 
> 
> 
> > [Original Message]
> > From: John Francis <[EMAIL PROTECTED]>
> 
> > There are still a few situations where 12 bits
> > isn't enough (especially if you want B&W images).
> 
> 

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