DxOMark's measured ISOs vs. manufacturer ISOs

Started Mar 13, 2013 | Discussions thread
Martin.au
Martin.au Forum Pro • Posts: 13,263
Re: DxOMark's measured ISOs vs. manufacturer ISOs

ultimitsu wrote:

Mjankor wrote:

Oh, right, so in your example, we can throw exposure out the window.

It has been thrown already, OMD got 2/3 stop more exposure than G3, Jack just exaggerate that a bit more to make the point more clear.

For a different scene brightness. DPR specifically state that the scene is not necessarily the same brightness for each test. If it's darker, you need a longer exposure.

Now you're proposing testing 1 camera with 1/100 exposure time, against one with 1/4000 exposure time. Why?

Exactly, if 1/100 vs 1/4000 is not right, what makes 1/100 vs 1/160 right?

The OM-D meters like other cameras, and has a final image brightness like other cameras.

Maybe maybe not, but DPR ought do the same exposure to OMD and other m4/3 cameras for a usable comparison.

False premise. The studio scene is not shot under the same lighting conditions each time. The ISO tests are the ones you're interested in. (They are shot with controlled lighting).

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tko
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