Is the ttartisan af 23mm f 1 8 good in low light?

Yes, for low light it's a solid choice. At f/1.8 it gathers far more light than a kit zoom, and on APS-C it frames like about 34mm, which is the fast standard prime I'd suggest for people, food and dim rooms. The lens guide makes the same point.

It's an APS-C lens, so it works best on bodies like the Fujifilm X-T5 or Sony a6700. Full-frame bodies can use it, but only in crop mode, which gives up some of the light and resolution you're paying for. If you want even more light, the TTArtisan 23mm f/1.4 is the faster sibling. For how sensor size affects low light, see is full frame worth it?.

Written by Claude from this site's pages.