D4 vs 1Dx (Imaging Resource), RAW, ACR, 6400-12800

Started Sep 4, 2012 | Discussions thread
OP rhlpetrus Forum Pro • Posts: 25,845
Re: Same size + 25600

Exactly, I mentioned that, IR changes lighting, so no way to know exactly what exposure was. DxO measures ISO ratings, we need to wait for that, it seems Canon is a bit optimistic, compared to Nikon, but the difference is typically within 1/3 stop, so not much relevant in real life.

And this is just one test, indication of performance via visual perception, not a scientific noise test. And it involves ACR as well. DxO will do it fr the sensor, but other tests have shown already that they will be close, as these samples indicate.

bobn2 wrote:

rhlpetrus wrote:

Exposure looks same (histogram).

The histogram doesn't give you a measure of exposure.

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