MJPerini wrote:
I agree with @bill Nikon If you buy the camera and the adapter , you can take your time and test your lenses.
You can always decide to spend more money.
The The D500 is a very good camera, I would be surprised if you really Needed the Z8 for better focusing.
You have a lot of 'all in one' type lenses, Have you ever tried a faster pro grade lens, I'll bet any focusing /sharpness issues would go away.
If you just Want a Z8, that is a fine camera too.
...well, I owned a D500 out of the gate and was very happy with it. But now I'm mirrorless and own a Z9...same focusing system as the Z8. There is absolutely NO comparison between the D500 and the Z8 focusing-wise, and, even though I don't own one, I want to say on ANY level.
If it's all you have the D500 is excellent, but if you own a Z8 too that old body becomes a door stop.