I wouldn't expect it as good as the RF 35mm.I consider 35 1.8 RF great on R5. hope 50 1.8 RF is close, that's all I am hoping for
I think people have to measure their expectations a bit. it's a pretty simple design. it's going to have it's flaws wide open.
you don't usually get small, cheap and optically great all in one package.
you get two of the three.