Hey everyone! I just picked up a used Sony a7 II as my first full-frame body and I’m trying to build a simple, affordable prime lens setup. I’ve been using the kit zoom, but I really want a prime for better low-light performance and sharper photos.

I’m mainly shooting casual portraits of friends/family and general everyday stuff (street, coffee shops, some indoor shots). Autofocus doesn’t have to be lightning-fast, but I’d love something that’s at least reliable enough for people who move a bit. I’m also trying to keep the kit compact since the a7 II already isn’t tiny.

Budget-wise I’m hoping to stay under about $300–$400 used (could stretch a little if it’s truly worth it). I’ve been looking at the Sony 50mm f/1.8 FE and a couple of older manual-focus options, but I’m not sure what makes the most sense on the a7 II specifically.

What budget prime would you recommend for the Sony a7 II, and why—especially if you’ve used it for portraits and low-light indoor shooting?