In-camera black and white image processing ~ Sony A7RII

I enjoy learning about how Sony processes black and white images in-camera.

Using an A7RII I mapped the tonal response as a matrix of settings with tone patches that express the numeric value measured.  

Selecting Contrast [0...-3] and DRO [Off...3] and normal jpg, and then adding as reference points two different tone mappings, which are outlined in 18percent gray - 

• 1EV steps from -2EV to +7EV and letting the highlights linearly roll off to +4EV pure white and shadows to linearly toe to -5EV as pure black (which Sony has chosen as the bottom end of the processing range) - maximum tonal separation by luminance (not color)
• Fuji GFX100RF tonal response mapping - which I particularly like

Here is the (rather giant) map -

Comments -

Looking carefully at the map I see why our visit to Vienna and my use of Contrast -3 "worked" as well as it did.  The shadow tones are fairly decent compared with any of the three references.

If I want the whites to "sparkle", Contrast -1 + DRO1 is quite nice.

If I want "creamier" highlights, Contrast -2 + DRO2 does the trick