You asked

Viltrox af 14mm f 4 air vs sigma 14mm f 1 8 dg hsm art?

The Viltrox AF 14mm f/4 Air is the one to pick if you want small and light. It's a very compact full-frame ultra-wide for Sony E, Nikon Z and L-Mount, and it's a good match for landscapes and travel where you're mostly working in daylight.

The Sigma 14mm f/1.8 DG HSM Art is for when light is short or you want more separation from the background. It opens two stops wider, and it also fits Canon EF and Nikon F, which the Viltrox doesn't cover. It's the bigger lens of the two, and neither lens has stabilisation.

If you shoot Sony, Nikon Z or L-Mount and want to keep your kit small, go with the Viltrox. If you shoot Canon or Nikon DSLR, or you often shoot indoors or at night, the Sigma is the better choice. Check third-party lenses to confirm your body accepts them.

Written by Claude from this site's pages.

From these pages