I believe their are some issues with IR and digital cameras, most prosumer cameras have IR filtration built in because of the chips' high sensitivity to that end of the spectrum ( as well as anti alias filters). The Canon 1Ds and 10D have their white point sensors mounted on the front of the body, I have both these cameras and have found the colour temperature to be very close to what I am viewing. Though I now do wonder if the front mounted sensor can be fooled by difficult lighting situations.
White point balance, unfortunately, does not always work if you are dealing with light sources that are mixing.
When using the Canons I always shoot everything raw so I have the option of correcting colour temperature. BTW I have built profiles for both my Canon cameras with amazingly accurate results. And yes there are limitations to making camera profiles: the manufactures apply their own settings in the firmware; different lighting setups; changing lighting conditions etc... But given the constraints the results can be quite good and I'd say (at the risk of being shot at :-) ) better than film in terms of how accurate they can be.
I am still of the opinion that a hi camera is the best option if you want to be really accurate on colour - for instance, Sinar has calibration built into its software package using a Macbeth chart. It would be nice to see prosumer manufacturers doing the same. If there are any lurkers out there take note please :-)
Kindest
Christ Gonta
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