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On 8 Apr 2002 at 22:33, Kennedy McEwen wrote: > It was incompetent negligence beyond belief that a Nikon engineer > expected the same calibration of one CCD to apply to all three to an > accuracy of more than 14-bits! (Since this is a systematic error > extending over complete scan lines the correction necessary to ensure > that mismatch is imperceptible is considerably greater than the noise > floor of the scanner). > > I still have trouble accepting that this aspect of the design wasn't > done by the Nikon tea-lady! :-) This particular theory was put forth by Ed Hamrick, and it was (and remains) difficult for me to accept. The much-dreaded banding on the LS-8000 is highly regular and periodic. Furthermore, it is in a direction parallel to the CCD array itself (ie., perpendicular to the scan motion.) On a color image, it affects at least two of the three color channels (green and red mostly.) I just don't see how this alleged calibration issue can lead to the banding that I and others have observed on the LS-8000. Furthermore, if this were a firmware issue, why wouldn't Nikon have issued a firmware update by now to deal with the problem? I am much more inclined to believe that this is a mechanical issue, perhaps related to stepper motor resonance. There is no doubt that the LS-8000 is the loudest film scanner I have ever used. rafe b. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.