Digital BW, The Print

> different color space. Then do your photoshop stuff on both of them. 
> Print with preview using a color profile for your output device, and
see 
> what, if any, differences there are.
>

here's an interesting test I just conducted:

created two identical 16-bit gray scale ramps, one in adobeRGB and the
other in proPhotoRGB colorspace. histogram and numerical details look
identical.

applied an identical 's' type curve to both images, bumping the
highlights a bit and darkening the shadows. just to create some
representative processing.

converted both profiles to Epson 2400 museo sr color profile (I think
this was supplied by crane and downloaded from their website).

The prophotoRGB registered the mean color as 154.11 with Median 168

the adobeRGB registered the mean color as 143.23 with median 172

Don't know what this means other than in this simple experiment they
don't translate the same, even when the resulting color profile is
identical. the prophoto histogram appears to have more luminance. 

interpretations welcome :)