You asked
What are the alternatives to the 7artisans af 85mm f 1 8?
The 7Artisans AF 135mm f/1.8 is the closest alternative I can point you to. It's a full-frame prime, so it's a natural step up for tighter portraits with more room between you and your subject. The 7Artisans AF 25mm f/1.8 is also in the catalogue, but it's made for APS-C cameras, so it only makes sense if you shoot on one. It's a wider option, not a portrait lens.
For other focal lengths, my portraits guide covers the usual options: a 50mm f/1.8 for everyday people shots, or a 70-200mm f/2.8 for outdoor headshots.
Written by Claude from this site's pages.