Quote Originally Posted by interneg View Post
My own experience is that making an adjusted .tiff from the scanner (especially in terms of setting curves before the scan) seems to offer more flexibility
Possibly the x5 is working internally with more than 16 bits per channel. Depending on how the 4.9D range is placed in the 16 bits it is possible that the effect you are guessing can happen, if the curves are applied to the internal (24bit perhaps) value before converting to 16 bits.

Nominal 4.9D is not a joke...