However, it does provide manual focus tools (peaking, which I find incredibly distracting by the way, and zoomed viewing, which is very unstable when hand-holding IMO) in the viewfinder which the D850 does not (I mostly use manual focus when working on a tripod, so for me this is not a major issue).
I've tried focus peaking with the D850 in live view and I also find it very distracting. Also I didn't find it useful for nailing the focus with shallow DoF. I haven't found focus peaking useful at all.
I've used 100% pixels in live view to focus a 20/2.8 AIS on my D800 then shifted back to the viewfinder to take a static photo of an atrium in a rehabilitation hospital. A tripod was not allowed. This worked but was clumsy and difficult.
I don't think it makes much sense to get a Z body unless you also intend to get Z lenses at least over a period of time if not immediately. In my opinion, the major advantages are in video and availability of lenses designed for a short flange back distance. There is also improved AF accuracy in some situations especially reported for longer distances (which is where DSLR AF tends to be more variable in result).
I would be limited to just a 24-70/4.0 lens for sometime so I'm afraid a mirrorless camera doesn't make sense for me so your point is well taken.
Since I don't have a business anymore and haven't for a number of years I don't need a 1:1 backup. I need an alternate to my D850 something to augment it. I'm wishing for a way to make more use of my legacy manual focus Nikkor lenses. I'm finding even the 0.75x viewfinder of the D850 isn't enough for my aging eyes.
What if you drop that Z6 II in the pond and by that time relied on its features as essential part of your kit?
That would be very difficult for me. At least I'd still have the D850. I came close this time but no harm, no foul. I haven't dumped a tripod since I kicked over my tripod in 1970 with a Nikon F and 55/3.5 Nikkor P. In that incident the standard prism on the F was damaged but still functional. The older one gets the more clumsy one gets. My mother used to say, "Your father is a bull in a china closet, but you're not that way." Well I'm getting clumsy like my father was at this age.
I'm toying with a number of options. A Z body probably doesn’t make sense for me. Maybe I need to consider F mount AF lenses for the D850. At least I could fall back on the D800. I came close to needing to replace my D850.
I’m an OK photographer, nothing great but photography is my passion. I’ve been hoping to make more use of my legacy Nikkors, AI and AIS.
Thank you for your reply.
Dave