I'm back home so I can supply 5DII RAWs for you please detail how you want them shot
Hi Marc, I remember you wrote once that you were on a trip months long.
If you have a printer, then there is a good solution. The same issue came up with Eric (a fellow poster here). He has a color checker card, but that turned out not to be reliable (in terms of noisiness). Then he had an idea: printing a color checker card. The result is much better than the original (but it can not be used for color profiling).
You can download a color checker file from here: http://www.rags-int-inc.com/PhotoTechStuff...hTarget_Lab.tif
For the noise measurement the colors are irrelevant; the point is, that the different color squares offer many different intensity levels in all three channels.
Before printing it out, pls remove the layer with the calibration numbers.
Print it please on hard, not mat paper, which does not have any visible texture. Eric printed it on glossy paper, which he is using for proofing.
The illumination should be *very* even, and the shot underexposed by three stops at least. In order to avoid unnecessary uploading, pls make two or three shots @ ISO 100 with different underexposure and upload them; I verify if they are all right. I would need them for all full-stop ISOs up to 3200; ISO 50 too only for demonstration, that it is a plain overexposed ISO 100 (there are some, who don't want to believe that).
Pls use a lens at an aperture, which does not create much vignetting.