On a recent job, I had the pleasure of using a Dalsa 4k 180mm prime lens. I had never heard of these lenses before, but understand that they are re-housed Leica lenses. Lovely bokeh, very sharp and great contrast and color.
I believe the aperture was T2.
It’s on the list to use these lenses on a job in the future.
Not sure where to go to find more info on them, but know that Sim Digital has a set.