Originally Posted by AV Science Sales 4
SOWK. The human eye probably can't decern an error of 1.5DE and your cheap probe (and that is not meant to be offensive) is simply not accurate or linear enough where a graph printed from its reading showing a deviation of 1.5 means anything. It is likely that your probe, even if sold with calibration offsets, measured for the probe or generic, has more error than that at several points. There is a reson that professional calibrators own expensive highly accurate probes (which are ubfortunaely slow but accurate) to generate an on site offsets for their cheaper much quicker probes.
A graph is just eye candy. Duh. I got de s of 0 everywhere. It is just as likely that having a de of 1.5 at one or more points is just as accurate. So many obsess at calibration and when reaching it on some graph is pseudo because of their probe. Generally, any true de of 2 or 3 or less can't be discerned by the eye but it does look bad on the graph and graphs are what this game is all about. The Pro shows his customers perfection graphs and hobbyists obsess and obsess and post purty graphs.
In that case, there is NO truly accurate (even professional $50k probe) meter, unless the meter can tuned to your eye particular tristimulus response!!! As each eye is slightly different in response from people to people, the professional perfection graph is only perfection from an "average" perspective.
I understand you seems to tell us that we should not be obsess with dE, as our probe is not accurate. However, this is what hobbyists do, and a way for us to justify our obsession to our wife :P