Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Steve Kale" 
<stevekale@b...> wrote:
>... From the RAW file I used Capture One Pro with high 
> contrast setting and simply slid the RGB black point slider
> up to the left of the red histogram and then processed
> (no other adjustments).  In PS, I then used the split 
> channels technique to work up a B&W version.  The image
> is of a sand dune against a dark (blue) sky.  My problem
> is that the red channel appears (on screen - I have not
> printed it yet) to be posterized in the sky....

Have you tried NOT adjusting the red histogram? Then what file format 
did you pass from Capture One to PS? What bit depth? I'm sure you may 
have already looked at these variables but if all are ok then may be 
it's just your monitor display properties. Just some thoughts.

--nick