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Author Topic: "Significant Differences"  (Read 631 times)
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« on: July 11, 2013, 05:36:03 PM »

This a comment for this page on the website
Hi DxO,

As a suggestion to help readers of this site, it would be great if you could explain what Road & Track magazine used to call "Significant Differences".  Simply put, Road & Track says, "This is the amount that is meaningful."  For 0-60mph it is 0.3mph, for braking 80-0mph it's 15ft, and for skidpad, it's 0.02g.

For DxOMark, when would sharpness between lenses be noticeable? 1P-MPix, 2, or what?  The same applies to the other measurements like distortion, CA, etc.  I realize there might be some challenges with this because they aren't uniform across the field, but it would be nice to know if the differences would really even be noticeable, especially in close tests like this one.  For instance, on the 600mm lenses would anyone be able to see any difference in the sharpness or CA measurements?  Maybe it could be tied to a print size, A3 or larger perhaps?

Just a suggestion, but one I've thought of for a while, and here's a sample of the Road & Track table from their website (forgive the crappy Google link):,d.aWc
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« Reply #1 on: July 22, 2013, 03:41:32 PM »


Thanks for your interest in DxOMark and your relevant suggestion!

We will try to do something in this regards in fall.

Best regards,

The DxOMark team
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