colour gamut question

A question for those with far more technical knowledge than myself.

here is the 5D2 colour gamut according to a brit photo mag. When I select either aRGB or sRGB in camera, does this gamut get trimmed to the "official" gamut, or do I still get the whole odd shaped actual gamut?

I have a supplementary question if I may: The curved colour display behind the gamut triangles is showing me what? The visible spectrum? Some artificial construct? Or something else?

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Hi Richard,
First, notice that this (according to the caption) refers only to camera produced jpgs. The actual capture space of almost any digital sensor is considerably greater, in some directions even exceeding human vision. (The colored triangle in the background is the CIE XYZ color space created in 1931 as a mathematical model of human vision.) The entire capture gamut is represented in the RAW data which is, in the RAW converter, given mathematical form by the camera profile and then converted to a standardized working space. Apparently, if this mag is right, the space being used by the firmware conversion and being called Adobe RGB by Canon is not in fact Adobe RGB but a variation of it. I knew that Canon does this with sRGB, using "Canon sRGB" rather than the real thing, but I didn't know that it is also true of Adobe RGB. How this relates to DPP, which uses Canon sRGB, I don't know.

Elie,

Thank you my friend. My knowledge of the science behind much of this is very limited.

I am amazed at how limited the sRGB gamut in particular is in the pale blue sector.

Lowner wrote in post #13918940
Elie,

Thank you my friend. My knowledge of the science behind much of this is very limited.

I am amazed at how limited the sRGB gamut in particular is in the pale blue sector.

Yes, that is where sRGB is particularly deficient, in the green and cyan. Canon sRGB is a bit wider on the blue axis and interestingly the magazine's description of "Canon Adobe RGB" is also wider in cyan, blue and magenta than official Abode RGB.
I know you use DPP and if Canon is playing silly buggers with Adobe RGB there also you might consider outputting from DPP in Wide Gamut RGB and doing a second conversion in PS.