TTArtisan 90mm f/1.25: Amazon / B&H Photo
The TTArtisan 90mm f/1.25 has been showing up as discontinued overseas and at B&H Photo for various mounts, so this lens will likely be hard to find soon. I think it is one of the best fast 90mm manual lenses at any price point and it even compares well to the outrageously expensive Leica Summilux-M 90mm f/1.5 ASPH. I own this lens for M-mount and adapt it for other cameras without issue.