I've had the Z6 since it was released - November 2018. Since then I've used it alongside a D850, and it's largely been my primary camera getting more than 90% of my images. That's nearly 30,000 images on the Z6 covering all types of work.
The bottom line is it's a great camera, and I don't hesitate to use it for professional work. I actually prefer it because of the EVF. What you see through the EVF is the image you are recording. Exposures are more accurate and you can view a level or histogram in the viewfinder. I program the Fn1 so I can zoom to 50% or 100% and check focus - or review an image through the Viewfinder. My menu changes are using the iMenu - accessed with a button and giving me easy reach for commonly used settings. I use the EVF for menu changes.
There has been a lot of talk about AF in the Z cameras. For stills and slow moving subjects, AF is significantly better with the Z cameras. The camera uses a combination of Phase Detect / Contrast Detect AF and delivers fast AF and improved accuracy. I had been using my 70-200 lens on my Z6 for a while and was happy with the images. Then I used it with my D850 and every image was backfocused by 4 inches. After proper testing I sent the D850 and lens to Nikon for repair, and both needed adjustment and repair. I had never noticed the problem because AF with the Z6 was perfect.
For fast moving subjects, the May 2019 firmware update was a huge advance. Now we have excellent AF performance for fast moving subjects. I've got more than 5000 images of birds in flight and more than 1000 images of horses going over jumps. The AF performance is excellent. Eye-focus and Face-Detect AF are both good tools if you need them. I tend to want more control, but I'm comfortable that I can use these tools for events or fast moving children. Right now I'd rate the Z6 AF slightly behind the D850, but well ahead of the D810 for fast moving subjects. But the Z6 is far ahead of the D850 for static subjects.
The FTZ works seamlessly. I get the same performance on the Z cameras that I get on my D850 with any AF-S lens. If the lens is slow to focus on a D850, it's slow on my Z6. But top lenses are fast. The 70-200 f/2.8 and Sigma 35mm f/1.4 Art lens are my favorites, but I've used most lenses with the Z6. In some cases, performance is much better. For example, The Nikon 200-500 and TC14E III teleconverter work very well on the Z6. In good light you have better AF performance with some teleconverter combinations than you do on a D850.
Here are a few images from the past few months. The last image was taken with the 200-500 and 1.4 teleconverter.
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Edited by ericbowles, 25 October 2019 - 08:11 AM.