This question is not strictly about ProPhoto, but it's relevant.
I'm just getting the hang of the basics of colour workflow. I have a Minolta MultiPro film scanner, which I scan Velvia trannies with, in 16 bit. The Minolta software can convert into AdobeRGB colour space.
I bring this into Photoshop CS, with working space set to Adobe RGB.
My monitor is a Hitachi glass screen, calibrated with a Spyder.
Now, I understand that the monitor's gamut probably doesn't cover much more than sRGB, so what does Photoshop do to display the image on the screen? Does it do a relative colorimetric conversion, thus clipping out-of-gamut colors, or does it do a perceptual one, thus compressing and desaturating everything? I'm guessing at the moment that it clips?
In which case, how do you tell how much has been clipped on the screen?
And, if this is the case, won't it be even more difficult to work with the out of (screen) gamut colors that exist in an even wider gamut source image? i.e, it's fine for both the image and the printer to have wide gamuts, but the screen is going to let the process down a bit?
Also, what's a good way to see how big a gamut your monitor is capable of? Is there a test image somewhere, say tagged in ProPhoto or RGB, which has the sRGB sub-range shown on it? How could I use such an image in PhotoPro to see how my monitor performs compared to sRGB space?