Another 1DX vs 5DIII review

Started Jul 31, 2012 | Discussions thread
Causio Regular Member • Posts: 234
Talking about 1/3 stop iso increments

The reviewer used intermediate iso levels like iso 5000, 8000 etc

Afaik, the 5D2 uses "fake" intermediate iso levels, for example iso 5000 is nothing but iso 6400 overexposed (in order to match the lower exposure speed required for iso 5000) and then underexposed artificially. (or perhaps it's the other way around using the base iso 3200). That's why I disabled the 1/3 stops iso increments on my 5D2.
Is this true for the 5D3 as well?

 Causio's gear list:Causio's gear list
Sony RX100 II Canon EOS 5D Mark III Canon EF 100mm f/2.0 USM Canon EF 70-200mm f/2.8L IS USM Canon TS-E 45mm f/2.8 +16 more
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