So I got curious, and found that the D800's need a firmware update to work with AF-P lenses.
No problem, always good to load up the latest software(firmware) .. 'ya never know what other goodies may come with it.

WRONG!!!!
(damned stupid Nikon!)

So I loaded up fw v1.11(up from v1.10) .. quickly tested it out on the lowly consumer level 70-300VR AF-P lens .. lens works as they said.
A few anomalies(pre warned of them) .. but no worries, can be ignored as insignificant on the whole.

BUT! .. what can't be ignored was that this new firmware subsequently wouldn't allow the Sigma 12-24(old model f/4.5-5.6) to AF.
I thought I'd stuffed something up when it stopped AF-ing.
Popped a few other lenses on and they worked, but not my (most used) 12-24 Siggy!



So I loaded up good old firmware v1.10 back onto the card .. prayed that it'd take(sometimes it's not possible to retrograde firmwares) .. but it installed.

Siggy AF-ing once again

Damned stoopid Nikon!!!!!(did I say that already? .. probably not enough )