The most sophisticated full frame mirrorless camera is Nikon Z8, so some rumor says. It was supplied to me by my son accidentally recently. Remember the past, my photographic equipment are all supplied in the same way unintentionally.
SONY A9 has been contributing for my photo hobby without specific dissatisfaction and all the lenses I'm keeping are E mount by way of any adapter rings, most of them are manual focusing system.
As for my surprise, Z8 model has "Focusing Aid" formed at left lower corner, this is really a great gospel for a manual focusing user like myself, remembering the silversalt period with NIKON F autofocusing period. Also Basic with star mark setting shows the same by color transformation from red square to green one.
Relatively heavy with 900 gr weight as Z8 is, it's body bulk could make it possible to hold even with a little finger so firmly, stoutness is one of the most indispensable requirement I declare. Especially, in case of some long forcal length lens setting up, this condition proves this phenomena in addition to the diameter of the bayonet flange.
APS-C E mount is fragile easily distorted and not suit with heavy lenses. On the other hand, SONY A9 lacked this physical property because of too small body design, though another performances are almost perfect. In addition, all the SONY genuine lenses are interchangeable on NIKON Z mount without any inconvenience, no matter how electric interaction might exist or not.
Consequently, a newcomer Z8 with 45 megapixel image sensor would be one of an essential equipment from now for sure.