Nikon Z 24-200 f/4-6.3 compared to Canon RF 70-200 f/4

Started 8 months ago | Discussions thread
peripheralfocus Veteran Member • Posts: 4,907
an egregious example
2

kenw wrote:

Your faith is misplaced. Try this one:

https://www.dxomark.com/Lenses/Olympus/Olympus-MZUIKO-DIGITAL-ED-75mm-F18-mounted-on-Olympus-PEN-E-PL7__972

And compare to this:

https://www.dxomark.com/Lenses/Olympus/Olympus-MZUIKO-DIGITAL-ED-75mm-F18-mounted-on-Olympus-OM-D-E-M5__793

Same lens on two cameras using the same 16MP sensor. And yet DXO gives a sharpness figure of merit of 13MP on one and 5MP on the other.

I didn't know about this example. That's a puzzler; if those are really their measured results, I'm amazed they didn't stop and say to themselves, "something is wrong here". If it's just a misprint or mistranscription of data, then I can see how they might not have noticed it.

For 15+ years, I did camera testing for publication, and, of course, there were times when I got results that seemed really unlikely. Never published them without going back and validating the tests in multiple ways. Almost always, it turned out that I had made a mistake or I had a defective copy of the equipment I was testing.

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