You asked

Nikon z 40mm f 2 vs ttartisan af 27mm f 2 8?

The Nikon Z 40mm f/2 is the one to get if you shoot full frame on a Nikon Z body. It gives a true 40mm view and the faster f/2 aperture. It's small, cheap and good, as the page says.

The TTArtisan AF 27mm f/2.8 is made for APS-C cameras, on Sony E, Fujifilm X or Nikon Z mounts. On APS-C it frames like a 40mm full-frame lens, but it's slower, and f/2.8 gives about the depth of field of f/4.2 there.

If you have an APS-C body, the TTArtisan is the better match for a 40mm-style view. The Nikon on APS-C frames like 60mm, which suits portraits better than everyday street shots. For how aperture and crop factor affect depth of field, see the focal length converter.

Written by Claude from this site's pages.

From these pages