You asked
Best camera for the viltrox af 9mm f 2 8 air?
The Viltrox AF 9mm f/2.8 Air is made for APS-C, so I'd pair it with an APS-C body. You get its full 14mm-equivalent view with nothing cropped away. Good picks from its list are the Sony a6700 for Sony E, the Fujifilm X-T30 II for a compact Fuji setup, and the Nikon Z50 II if you shoot Nikon Z.
Full-frame bodies such as the Nikon Z6 III also take this lens, but only in APS-C crop mode, which lowers the resolution. I'd only go that way if you already own one. For the sensor background, see sensor sizes.
Written by Claude from this site's pages.