Yes, the D5s are the 'official' Handheld Universal Lunar Cameras (HULCs), but (a?) Z9 also got on-board at the 'last minute' (which means two years ago):

* https://petapixel.com/2026/04/02/a-nikon-z9-made-it-aboard-t...

They have a thermal blanket for exterior work:

* https://petapixel.com/2026/02/24/artemis-ii-astronauts-will-...

* https://petapixel.com/2025/01/10/the-custom-nikon-z9-and-the...

* Various stories with the "Artemis" tag: https://petapixel.com/tag/artemis/

The D5 has been used on the ISS, including EVAs, since 2017, so they're a known quantity:

* https://en.wikipedia.org/wiki/List_of_cameras_on_the_Interna...

The Mercury and Apollo missions used Hasselblad 500-series-based cameras (modified):

* https://www.hasselblad.com/about/history/hasselblad-in-space...