The other 3 are likely to need a calibration value outside of this range. What does this mean in the real world? Well, it should mean that if you pick any (FoCal supported) Canon camera and then grab yourself 10 of the same lens type from your (impressive!) shelf, then 7 of those lenses should need a calibration value between about -5 and +5. About 70% of all the results are within the red area. The vertical blue line is the mean of all the results, and the red shaded area is one standard deviation which is a measure of the spread of the data. The blue curve is a standard gaussian curve and we can see that the results fairly well mimic this. The actual number is unimportant (for these charts the most popular AF Microadjustment value will go up to 1.0) and we can see that the most popular AF Microadjustment result across all Canon cameras and lenses is zero, which is great! So what does this chart show? It’s a count of the results at each microadjustment value – the higher the yellow bar, the more results at this microadjustment value. We remove any results from tests which failed under odd circumstances, those who’s result calculation quality is not very good and various other reasons that might mean the data is not really representative). (* valid results are those which pass our internal criteria for being “sensible” results. AF Microadjustment Values for ALL Canon cameras and lenses
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