DxOMark's measured ISOs vs. manufacturer ISOs

Started Mar 13, 2013 | Discussions thread
Jack Hogan Veteran Member • Posts: 6,988
Goodness tex, you've been busy

I don't even know where to begin, so I won't because something tells me Iìd be wasting my time, but for mere fun I'll take a crack at this gem

texinwien wrote:

Jack Hogan wrote: Because of this fact it is not possible to measure the performance of camera A at a set in-camera ISO (let's call it Subjective S) and expect to meaningfully compare its results to those from Camera B at the same ISO setting.

Please provide a concise example in support of this statement. To be clear, I am challenging the validity of this statement and asking you to provide proof for it.

Here is my concise example:

Fictitious example of why arbitrary in-camera ISO labelling is not conducive to meaninglful comparisons



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