I love this reflex nikkor 500mm! I don’t know how I will ever get it in focus, but I just slapped it on my Z6ii, cranked the ISO up to around 24,000, leaned back on the sofa, and caught my budgie drinking gin. A very dark room.
It’s like a beautiful and magical tool - even more so when you can nail the focus :-)
I know it’s a pretty duff image, but for a first image with a ‘new’ lens I am delighted :-)