Photographic Dynamic Range (PDR) is a More Useful Measure than the DxOMark Landscape Score

Started Apr 17, 2015 | Discussions thread
OP bclaff Veteran Member • Posts: 8,712
Re: Photographic Dynamic Range (PDR) is a More Useful Measure than the DxOMark Landscape Score

Just a couple of point ...

Regarding SNR = 20 see the other clarification.

Regarding E-M5 versus GH2 you intermix two concepts and make it incorrectly appear that the result has to do with FWC when it has entirely to do with read noise only.
That's because sensorgen reports read noise in electrons, which came from read noise in DN and gain, and gain came from FWC / (ADC range).
The one stop difference in the Landscape score comes from the one stop difference in engineering dynamic range. Both are 12-bit ADCs and the read noises in DN are about 1.173 and 2.083 respectively.

BTW, slightly OT, I analyze DxOMark data too and have results similar to but not identical to that at sensorgen. The results differe because we take a different approach to the data.
FWIW here's one of my charts .
(Let's not comment on this side topic here and pull this thread OT)

Regards,

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