DxOMark's measured ISOs vs. manufacturer ISOs

Started Mar 13, 2013 | Discussions thread
Jack Hogan Veteran Member • Posts: 6,982
Re: DxOMark's measured ISOs vs. manufacturer ISOs

Andy Westlake wrote:

Jack Hogan wrote:

The OP provides evidence that the EM5 is an outlier

The OP is using DxO's 'measured ISO' to reinterpret tests that are calibrated to a different ISO definition (ISO 12232:2006 Standard Output Sensitivity). This is entirely erroneous.

Bertrand Russle is turning in his grave.  Are you sure it's SOS in every single one of the cases he mentions?

It seems to me that any of the recommended parameters in that there standard could have been used, depending on camera and manufacturer: Saturation Speed, Noise Speed, SOS or REI.

No matter, he's got a point

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