Night before last I wanted to try out the new Nikon D850 with a few longer lenses I have to see how well it would capture images of the moon. I mounted everything on my motorized tripod for astrophotography work so I could more easily track the moon and keep the camera as steady as I could. Honestly, I really need a remote shutter trigger for this purpose, as just putting my hand on the camera introduces a lot of jitter, which is certainly reflected in the photos taken. Anyway, here is the results I got.
Nikkor 500mm reflex lens:
Nikkor 1000mm reflex lens:
Sigma 50-500mm zoom lens:
Now to compare the above with an image I took using my Nikon Coolpix P900 camera with it's integral 24-2000mm zoom lens.
Personally, I think I'll stick to the P900 for photographs of the moon. Unless further trials using a remote shutter trigger improve the results I got from the D850 substantially.