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Here we look at the actual bit depth of the Sony RX10 III raw files.
The example image used here is the ISO 100 image from the dolls ISO series, as shown at right. It is a perfect ETTR exposure courtesy of the excellent metering of the RX10 III, as proven by the RawDigger histogram.
Sony RX10 III gradation and bit depth
Referring to the histogram below, one might at first glance think that the Sony RX10 III offers a 14-bit file, since the values go out to nearly 16000 (2^14 = 16384). But as the following histograms will show, range is not the same as (true) bit depth and gradation (fineness of steps).
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