Why not the sigma art 35mm f1.4? It is sharp. I used to owned one with my former 5D3.
A good option and, to Carlo's point, may be more on the side of microcontrast. But, I too have owned one before and my copy was a F'ing disaster. If it focused near MFD it would get stuck...I literally had to give it a helping hand. Lots of people have AF issues with the Sigma. And, since it has a tiny focus pull from MFD to infinity, it's worthless as a manual focus lens.
There is one other thing that bugs me with the Sigma 35mm: it has some funk in the color. When I look at all the 35mm lenses I have owned/tested it has the worst color rendition of them all by comparison. That's subjective and personal of course, but it's another thing that makes me hesitate. BTW, when I look at all the Sigma 85mm f/1.4 photos I see fantastic color, so I don't think it is necessarily a Sigma thing; just a 35mm Art thing.
Nonetheless, I may indeed circle back to that option. Price is certainly right.
It can be had for under $300 these days which is absurd as it's one of the best 35mm's out there according to several reviews.
I was torn between the UWA adapter for my 28mm or the Samyang 12mm f2 for my Fuji and in the end I went with the Samyang.





