I'm thinking of upgrading from a D610 to a newer Nikon camera. I also have a Sony A6500.
Price-wise, I can get a new Z6 II for about the same price as a used D850 (with a shutter count of about 100k). I have a number of F-mount lens I'll use, so I only need the body.
Any suggestions and advice much appreciated. I'm primarily concerned with image quality. For around $2000, what camera do you suggest is best to get? Or should I move over to the Sony a7 series?
The two real questions here are how much do you want to spend and do you plan to shoot wildlife or sports? The first question only you can answer, but for the second one, I can say that unless you're shooting wildlife or sports, the Z6 II more than capable for everything else. The biggest advantage of the D850 is resolution (which you could get in a Z7 II minus the AF performance). But unless you're shooting those subjects, it's hard to justify a D850 these days. That's not to say the Z6 II can't do things, but it may just require more effort on your part in those genres. The D850 is able to track a bit better though and it's AF is a bit more snappy and sticky from what I've seen (the Z system can be a bit unpredictable at times, and slow especially if you lose focus while tracking).
There aren't going to be anymore F-mount lenses (although on the flip side, since the mount is "obsolete" in a way, this might make finding new and used lenses cheaper as many people have or will move to the Z mount at some point if they've made the jump to ML).
The other thing is that the D850 support will probably end this year as that camera is about 5-6 years old now and Nikon usually only gives their cameras about 5 years of "mainstream" support (firmware updates, performance updates, etc). The Z II's have about another 3 years of support to go, even if a successor is announced, or a Z8 comes out.
I would maybe get the Z6 II for now if you feel the need to get something "now", because a Z8 may come out this year, which supposedly should be a D850 replacement (and also a rival to cameras like the R5 and A7R IV/V).
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