Does this mean there are some non-tungsten (perhaps LED) versions that are better?
If so, any clue which revision? I have an A and B, my dealers rev. D seemed to perform much better than either of mine. Not sure what is different about it.
I've only had the A and B revs. I think the rev D was supposed to be a white LED. I know it is in the more recent HP Z printers, and some other X-Rite devices. The IsIs is a little different as it has a UV emitting LED as well to make for dual readings.
The LEDs are narrow band, and supposedly very stable, yet filtration is a challenge to correlate to a broad spectrum according to what I have read.
So if the Rev D is indeed an LED, then yes it should be more stable, yet unfortunately the inter-device agreement with other spectros perhaps even more out of tolerance. Brings up the question is which one is the right one>