Panasonic Lumix G85 brand_Visibledust but it’s a pretty sturdy

but it’s a pretty sturdy platform for almost any reasonably-sized camera

Nikon Nikkor-M 300mm f/9 lens in excellent condition

3G ED VR AF-P DX Nikkor is a modern F-mount telephoto zoom lens with an image stabilizer system and Nikon's AF-P focusing system

as well as flash exposure- plus a built-in Pocketwizard-compatible wireless triggering system

so you should be able to use it on other systems just as effectively

Panasonic Lumix G85 brand_Visibledust but it’s a pretty sturdyThe Panasonic Lumix G85 is a compact Micro Four Thirds camera that shoots 16mp stills and video up to 4k30. There's a 5 axis in body stabilizer, too, plus a high resolution OLED EVF and a 3" tilt swivel touchscreen a nice package. In excellent condition, with only minor cosmetic wear. Includes two batteries and USB charger.