DxO, here we go again.
DxO defender, here we go again.
If you think, that a sensor (and I said sensor, not camera) can be fully described with an overall score in 0-100, you are silly.
Ergo DxO is silly because that is exactly
what they claim can be done when they publish their scores. I will stop hammering them for their stupid overall scores when they remove them all from the site.
And they have the charts. This is the data. If you know, what to look for, DxO is a valuable source of information, which can not be compared to any other review, as this is standardized and reproducible.
I contest this point. At least as far as dynamic range is concerned, there are repeat instances where they are clearly wrong.
But again: if you don't go for the charts, you waste your time. And ours as well, as we have to read all this "biased", "crap", "not reflecting reality" comments, which are based on the lack of knowledge.
Are you part of DxO? Well...we will stop "wasting your time" when you stop wasting ours publishing silly overall scores that are repeated ad nauseam in forums. And when you correct some of the obvious flaws in your test results.
* Rank $40,000 medium format digital backs lower than consumer APS-C DSLRs.Medium format backs are expensive...
Yes, they are. Their IQ also wipes the floor with consumer APS-C equipment. (And that's coming from a huge fan of today's APS-C sensors!) And DxO looks stupid for claiming otherwise.
* Report physically unachievable values for dynamic range (i.e. >14 stops from a 14-bit ADC).Nonlinearity? Yes, it ruins the uniform sensitivity, but it exists, whatever you do.
Nonlinearity has not yet been incorporated into sensors. You can compress more than 8 stops into an 8-bit JPEG this way (i.e. Canon HTP), but RAWs are simply not non-linear at this time.
* Report values for dynamic range that I know to be false from both personal experience and testing. (They rank the 10D, 20D, and 7D about the same. The 7D is a good 2 stops better.) The "about the same" is 0,7 EV difference, not to mention, that I would be interested in those tests.
If you work for DxO, do the entire team a favor: buy a transmission step wedge and use it. Don't run it through a flawed computer analysis. Actually use it and eyeball the output. You will be embarrassed at some of the mistakes in your database.