Color gamut of 1D/1DMkII

In researching color spaces I cam across this webpage showing the color gamut C1 believes the 1D and 1DMkII have relative to some well known color spaces. I don't know where the information comes from or why the two cameras are the same, but it certainly is a definititve answer to a question I posed sometime back. It appears that ProPhoto RGB is necessary to preserve all the color capability of these camera and has the additional bonus of lower gamma that Adobe RGB or sRGB.

I've decided that I'd really like my 16 bit TIFF's/PSD's to be encoded in a linear color space rather than one of the four offered by ACR. Anyone know if ACR can be extended to fix this? I know C1 can be but I don't care much for C1.

Is it that much trouble to batch convert your raw files on C1 to 16bit Tiff linear, output in ProPhoto RGB and then start your work in Photoshop? Is there anything you can do in ACR that you can't in Photoshop?

A related question: Does your monitor or any printing process you might use display the 1D colors that are outside Adobe RGB?

Yes, ACR does things that neither PS itself nor C1 do, namely really good CA correction. I wouldn't mind using C1 if it weren't for the terrible user interface and the lack of lens optimizations. I've have yet to find a good plugin for doing CA corrections within PS. PWP does it but I don't want to run three separate apps. ACR offers a convenient way to do custom camera calibrations (which I don't use but might).

If I were to use C1 I wouldn't need ProPhoto RGB. There are linear color spaces available and C1 supports them (just as ACR should but does not). At least C1 preserves some EXIF data now! It doesn't support Kodak, however. Lens optimizations and Kodak support, that's all I ask!

Regarding output device gamuts, I doubt it. My original question was whether the camera had a wide enough gamut to justify something other than sRGB and the answer is clearly yes. Using a wide gamut profile means preserving all the color information you originally captured; possibly enabling a wider range of adjustments (in 16bit mode). My interest at this point is using a color space with the lowest gamma. ProPhoto is 1.8 whereas the other two common choices are 2.2. With C1 I could use a color space with a 1.0 gamma but with ACR I'd have to accept a lossy conversion. ACR does all its internal processing in linear mode.

Go to this link on the Adobe Photoshop forum...make sure to look at all of the responses, especially of the noted PS guru Bruce Fraser;

http://www.adobeforums.com/cgi-bin/webx?14...f.1@.3bb5f89c/4

ProPhoto RGB appears to be the best choice with the minor problem that many PS plugins fail to provide color managed previews. Since ProPhoto is gamma 1.8, those previews will appear dark (on a PC anyway). Still, the advantage of operating in a gamma 1.0 color space is avoidance of gamma induced errors. ProPhoto RGB is better than Adobe RGB for this but linear is better. The AIM site I linked to has some interesting feedback for Bruce Fraser.

The problem with linear color spaces is that they appear to have chunky shadows in PS and make editing difficult. Non-managed previews are virtually impossible with linear gamma since the image will appear largely black. NeatImage is bad enough with ProPhoto RGB.

For now I'm using ProPhoto. I'd like to use AIM's linear space instead but it seems to be difficult to adjust to. I don't have to give up ACR to use ProPhoto.