HHPhoto
Well-known
I've gotten the firmware upgraded on several Nikon F6s. Pre upgrade, they all showed the F6 Nikon logo (see 3rd image here) on the LCD panel. Post upgrade, the F6 Nikon logo was gone. Just my observation though, and I'm not sure if its a definitive way to tell if the firmware has been upgraded.
No, that is unrelated.
Also the current brand new F6 show the Nikon F6 logo on the rear panel, if certain modes are used (P in connection with some others; as soon as you switch from P to A for example, the logo disappears).
Cheers, Jan