Fatif Board

I need to know how Fatif boards work.
They look different to me, they have a hole with a thread, it means that they need special lenses and shutters?
Thank you
C

I have an 8x10 Fatif and while the lens boards are specific to mount on the camera, the holes for the shutter are the "usual" and I have Copal 1, 3, Compur and Betax shutters mounted. I have seen some odd looking boards that appear to allow you to mount Hasselblad or Pentax lenses, but you can find some pretty unusal Sinar boards, too.

You are right, I noticed that the thread it is not really on the hole of the board but it is on a ring that is screwed over the board.
I don't know what this ring is for, maybe for a specific lens.
I saw the Fatif lensboard you are talking about, they are for medium format lenses,
Thank you
Carsten