Canon has released a free new white paper all about the technicalities of high dynamic range.
They write, “Considerations of HDR starts with understanding that our human visual system (HVS) has wonderful capability in terms of our ability to view real world scenes under an enormous range of scene illumination – from blinding sunlight to dim starlight. Our HVS cannot instantly do this if we are suddenly moved from one extreme of illumination to the other. The HVS must adapt over time.”
Read the full paper here.