SONY ALPHA 7S - MEASURES
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Measures obtained on raw files (.arw) using Iris (christian
Buil) after conversion to DNG with Adobe Camera Raw.
Photosite capacity at 100 iso: 157000 electrons.
Read noise (below) strongly drops at 2000 iso to reach 1 electron or even less at high iso. Seetings over 102400 iso are useless.
The drop of read noise at 2000 iso causes an increase of the dynamic range:
Camera Raw converts them to DNG 14-bit linear raw files but the histogram below
shows that only even values are used (13-bit data).
However, in continuous drive mode data drop to 12-bit.