From: bjs@RUTS.ccc.amdahl.com (Barry Sherman)
Newsgroups: rec.photo
Subject: Re: Contrast mask for Ciba's (was Re: Chrome prints other than Ciba's)
Date: 17 Nov 92 20:12:10 GMT
Reply-To: bjs@RUTS.ccc.amdahl.com (Barry Sherman)
Followup-To: rec.photo
Organization: Amdahl Corporation, Sunnyvale CA

G. Hugh Song writes:

>In article <33Qt02j22b4T01@JUTS.ccc.amdahl.com>, bjs@RUTS.ccc.amdahl.com (Barry Sherman) writes:
>
>|> The second thought that comes to mind is that often a mediocre Ciba exhibits
>|> too much contrast and creates a harsh effect that might be called "metallic".  
>|> This is usually curable by producing what is called a contrast-reduction mask.
>|> This is a low-density, low-contrast b/w negative which is sandwiched with the 
>|> original when it is printed.  The effect is that the negative is dark where the
>|>  transparency is clear and clear where the transparency is dark.  This, 
>|> effectively, reduces light transmission through the high values without 
>|> reducing it through the low values.  Thus contrast is reduced. 
>
>What happens when you use a color negative instead of a b/w negative?

Hmmm.  The thought never occured to me.  The first thing that pops into my
mind is that the orange color mask would have somewhat deleterious effects.
And it couldn't be neutralized because it's not of even density.  

But if the color mask *could* be neutralized, I'd expect that the effect would 
be to greatly reduce color saturation as you'd be, effectively, filtering
with the opposite color to that present in the original transparency.  I 
doubt that the effect would be pleasing, although it might be interesting
in the right, abstract, cases.

> 
>|> The general rule is:  If you want prints, shoot prints.  If you want slides
>|> shoot slides.
>
>I wish I could bring a medium-format for color negatives and a 35mm for slides
>to the field.  But the problem is that other members of my family 
>want me to carry their stuff (picnic basket, baby stroller, etc), not just 
>my camera gears.

Ack.  Clearly your family has its values all mixed up.  You should educate them
as to the all-importance of ones camera gear and teach them to be thankful
that they're not required to carry *your* camer gear!  :-) :-)

Barry
--


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Newsgroups: rec.photo