Do you even know who you are trying to convince of what my friend?
That was clearly not taken using either face detection or eye focus, so I fail to see your point.
SLRs don't have eye detection. Neither do the Z6/Z7, though, so there's no advantage to be gained in that respect by moving. And, if you're going to still be using all your old F-mount lenses, because Z-mount equivalents aren't available yet, you're giving up performance while not getting much back in return.
If there were native versions of the lenses you needed, it would be a different story - you'd gain all the benefits of mirrorless without giving anything up. But that's not going to happen for the Z mount for at least a few years.
I can think of some:
- Video... if you want to do video, Z system looks like an interesting option to use your F lenses (while switching to Z lenses if you really are looking for autofocus).
Have you seen the battery life on this thing? It's rated for half the number of shots as the A7r3 for stills (in reality, the A7r3 gets you thousands per charge, not the stated 600-700) and reportedly only manages video for 15 minutes.
The output format looks good, but, unless you want to keep it plugged into a charger the whole time, the battery life might be a killer. Also, there's nothing stopping you from using F-mount lenses on an E-mount body for video. And the A7s3 is just around the corner (supposedly October).
- You really want to go mirrorless... This is the best path for Nikon users right now.
Then you really need to ask yourself why.
In general, you move to a different format in order to do something you can't do, or can't do as well, with your current equipment. With the Z6/Z7 and current lens lineup, that's not a lot - the D850 and D5 can do almost everything just as well or better than the Z6/Z7, particularly if you're going to stick with F-mount lenses and use them via an adapter. If you're not going to keep the F-mount lenses and plan to start afresh (which is perfectly reasonable if you only own one or two easily-resellable lenses anyway), then you're just as free to choose Sony and (likely soon) Canon as you are to choose Nikon - in which case, why are you going with the system with unproven bodies and only three lenses to choose from (with a few more dribbling out over the next few years) instead of a proven system with a large collection of lenses to choose from, including fast supertelephotos coming online from this year?
The point is, is there any reason for the F-mount user to shift to Nikon mirrorless
right now, as opposed to moving to Sony/Canon, or sticking with SLR and making a move to mirrorless (in whatever format) in a few years time, as F-mount dies down and your lenses shift towards obsolescence? Probably not, from a purely performance point of view. If you just want to change to mirrorless for the sake of going mirrorless... well, that's not really all that logical.
The goalposts seem to be shifting here. We've been told that mirrorless is where it's at, and absolutely essential for making halfway decent images and that Nikon and Canon are hopelessly left behind and Nikon users are flocking to Sony. Overnight that unassailable lead in technology has disappeared, Nikon users have no incentive to switch to Sony, but we are told that in any case there's no interest in swapping your Nikon DSLR for mirrorless.
So what was all the fuss about anyway?
Mirrorless is where it's at
for new systems. As in, if you didn't own any full-frame camera gear, you probably wouldn't want to go out and by a whole collection of EF- or F-mount lenses and bodies, since both systems are likely to gradually wind down over the next 5-10 years or so. This is because SLRs are near the pinnacle of their development, and new technologies that will meaningfully improve the shooting capabilities of cameras almost all require image data that only the through-the-sensor mirrorless approach can provide. At this point, if you were buying a new system, with no pre-existing collection of lenses, it would make most sense to go for Sony, since they have a semi-mature system with a wide range of lenses, in a format that isn't likely to lose support and updates over the next decade.
If you already have a collection of full-frame SLR lenses, it's different. Presumably, you want to keep on using those lenses for as long as you can, until they break down or are so thoroughly overtaken by technology that you have to replace them anyway. SLRs may be at their peak and mirrorless cameras may have much more potential, but, for the moment, their performance is around equal. But adapted lenses almost never perform as well AF-wise as lenses used on their native mount. So, by bringing your SLR lenses over to a mirrorless format and using an adapter, you aren't gaining much, and losing a good chunk of AF performance. Better to keep on using SLRs for as long as possible, keeping the full performance of your lenses but not accumulating any more of them, until either your lenses are no longer even second-rate by the standards of the day, or the gulf in performance between mirrorless and SLR systems grows so wide that you wouldn't want to miss out on the performance - at which point you would ditch the SLR system entirely and start afresh with whichever mirrorless system most suits your needs at that point in time.
There are obviously a few exceptions to this, such as when the mirrorless system offers one specifically sought-after feature that the SLR system lacks, and the user doesn't care about AF. This was the case with the migration of Canon-using landscape/studio/non-action photographers to Sony when they launched the A7r, when Canon was unable to keep up in either resolution or low-ISO dynamic range. But this is not the case with the Z6/Z7 - Nikon SLRs use much the same sensors, with
much the same performance.
The main reason for going mirrorless is future-proofing, not current performance. F-mount, and likely EF-mount (unless Canon decides to use EF mount on mirrorless and simply designs all future lenses with motors and control systems with mirrorless focusing in mind) will likely be relics in 10 years time. E-mount probably won't be.