On 2010 Feb 2, at 7:49 PM, Graeme Gill wrote: > spotread -S -i D50_0.0.sp When I measure a particular piece of paper with just spotread, I get this: > Result is XYZ: 88.509296 91.511759 75.273499, D50 Lab: 96.620372 0.501330 > 0.184133 But when I add -i D50_0.0.sp, I get this: > Result is XYZ: 87.826439 91.487282 72.041893, D50 Lab: 96.610330 -0.708287 > 2.983602 Why the large discrepancy? I thought spotread used D50 by default? Is there more than one D50...? Cheers, b&