Dynamic range and RAW file "bit depth"

Started Jan 25, 2014 | Questions thread
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Re: Dynamic range and RAW file "bit depth"
In reply to szhorvat, Jan 25, 2014

That would make sense. The nonlinearity will begin the moment there are interactions between the electrons deficiency in the well. It takes more energy to remove an electron from a more negatively charged body. So that 'compression' is not necessarily engineered, I think it's a consequence of physics.

However, the way you digitize the signal, is engineered. The camera devotes the least digitization levels to lowest signals and that should, in theory compensate for the nonlinearity of the relationship between photon flux and well filling.

This is why DXO reports the  S/N ratio at 18% btw. This 18% corresponds to 50% gray.

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