You asked
Is the 7artisans af 85mm f 1 8 sharp wide open?
I don't have test results for this lens, so I can't tell you how sharp it is at f/1.8. What I can confirm is that the 7Artisans AF 85mm f/1.8 is a full frame prime with autofocus, sold for Sony E, Nikon Z and L-Mount, and it isn't stabilised. On APS-C it frames like about 128mm.
For a portrait lens, I'd check independent reviews for wide-open sharpness before you buy. Wide-open softness is often less of a problem than it seems, because at f/1.8 the depth of field is thin and eye autofocus does most of the work. If you want to know what f/1.8 does to your background, Portraits explains how it plays out.
Written by Claude from this site's pages.