In my community, someone has already made an 1.25 adapter.
They tested quite a lot eps, seems it's able to reach focus on most of them including HFW 12.5mm, Docter UWA, Pentax XW 20, Nikon SW 17.5, Morpheus 6.5, Vixen HR 3.4, XWA 9mm 100°, etc.
They did a quite extensive review vs ATX 95. The...