Overview

The Viltrox AF 9mm F2.8 Air is an ultra-wide APS-C prime praised for excellent center sharpness from f/2.8 and very good corners. Weaknesses include heavy vignetting (3 EV at f/2.8) and some flare when shooting into the sun. Build is lightweight plastic with a metal mount, focus-by-wire, and no weather sealing or aperture ring. It suits landscape, travel, and event photographers seeking an affordable, compact ultra-wide for Sony E, Nikon Z, or Fuji X.