Mark II surpasses both the Nikon and Sony by nearly +0.5EV

[brianftpc]

"Canon cameras are known for high ISO noise performance, and the Mark II surpasses both the Nikon and Sony by nearly +0.5EV"

Then why the hell cant I see it. I own both the 1Dx and 1Dx mk2........I see zero high ISO difference...nor have I seen any in ANY review. Have I missed a firmware upgrade???

 

[aceflibble]

No, you just don't understand what they mean or how these things are tested. Actually go read DxO's various Q&A/FAQ pages explaining how they measure each aspect of a piece of hardware. This page, specifically, explains the use case for ISO performance findings. For further reading, check this one]http://www.dxomark.com/Reviews/Detailed-computation-of-DxOMark-Sensor-normalization]this one. For more information on how they test every aspect, not just ISO performance, simply read the rest of their explanations and FAQs.

If clicking a link seems like too much hard work and you want the lazy and dumbed-down answer, here you go:
High ISO performance is defined by the maximum ISO the sensor can go to while keeping a SNR of 30dB, a dynamic range of 9EV, and a colour depth of 18bits. The way you're most likely looking at your own files is just at the per-pixel noise, which is the same as only looking at the SNR. You're also unlikely to be factoring in how each sensor drifts from its stated ISO slightly differently. This is why pixel-peeping at home is not smart and tells you nothing, but it's also why lab tests don't matter. You don't see a difference; that's fine. That does not mean the lab testing is incorrect, but it also does not mean that it matters. If your pictures look good to you, fine.

 

[Refurb7]

Your pictures are what matter. Not what some testing people say.

 

[brianftpc]

Thank you for the explanation ace

Im just still pissed that I waited 4 years to see my pictures look the same at ISO 6400. Its actually a tough decision between using my 5dsr and 1dx mk2 even for sports bc the low light high ISO froze for a generation. I can get so much detail and noise reduce so well with the 5dsr that it gives me a better image than the 1dx mk2 but its lacks the autofocus of the 1dx mk2. If they had a 5,000 version of the 5dsr in a 1D body with the 1dx mk2's video capability and autofocus Id probably buy it and not use the 1dx mk2