Mike wrote: >Early tests using the Stouffer gray scale obtained with Vuescan (Slide >setting and B&W=0.001) show exceptional linearity down >to an OD of 2.11, then an abrupt flattening of the curve above that. Dumb question - are you using 48 bit output from vuescan? Rob Rob Geraghty [EMAIL PROTECTED] http://wordweb.com