Since disassembling and cleaning my 500mm reflex Nikkor last winter, I had it in mind to try more astrophotography with it. It used to be somewhat fuzzy for moon photos.
This is tonight: Zf, FTZ-II, 500mm f/8 Reflex Nikkor (from about 1981) + 2X teleconverter (of the cheapest full-manual kind)...