Someone have to go ahead and test a Nikon... Not the D3/D700 but the D3x
Well, someone should make the test shots, like Erik Kaeffehr did with the A900 and Marc McCalmont with the 5D2.
I have the raw data from DxO lab to share with the interested
Upload a sample please, I take a look at if and how far I can use it. For example Imaging Resources files are not useful for *this* purpuse. Their color checker and gray step cards are downright dirty, and the exposure is too high. I can't use nice, well exposed shots, I need by three stops underexposed ones.
Btw, if you have tham, one from the A900 would be very interesting; not for measurement (Erik's shots are excellent), but perhaps I can show, why DxO misevaluated the DR and noise.
with little doubt, the D3x's red channel is a lot cleaner than the Canons
I don't have a monochromator (nor the camera) to make a full spectral response analysis, but I did compare the filter transmissivity on white, on the primaries and on a few other patches of the color checker card (on IR's images, with reliably constant illumination).
I don't see a *huge* difference (I see a larger difference in the blue). However, one needs to add the difference of the ISO sensitivity (the D3X "utilizes" the exposure better than the 5D2), then the difference is relevant.