Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., Jon <vze249jf@v...> wrote:
> >> What are the advantages of scanning a grayscale neg as a 
transparency?
> >> 
> > Stan,
> > 
> > A B&W neg is a transparency but the term has been co-opted to 
mean a color
> > slide so some confusion.
> > 
> > Martin
> 
> 
> Martin, 
> 
> I was always under the impression (possibly mistaken) 
that "transparency"
> was a term used for positives, such as Velvia or Scala. True that a 
negative
> is transparent... I wonder if the use of the term came from the 
projection
> world.
> 
> Jon

Jon:  Two basic types of scans, transmission/transmissive and 
reflection/reflective.  Transmission means the light source is on one 
side of the transparancy/positive film/negative film and the detector 
is on the other--light passes through.  Reflective means the light 
source is on the same side of the opaque object as the measuring 
device(example photograph on flatbed scanner)--light is reflected 
back to the detector.

Martin is correct, transparancy is a confusing term.

Jeff Randall