The process of M-mount conversion was not recorded, it's a bit rough and tough.
The lens is always in BULB mode, for I could not change the shutter mechanism.
MFD = 0.91m, and that hood is "Tiffen #608 LENS SHADE MADE IN U.S.A".
This hood is not tight enough for this APS-C size sensor, someday FF will come.

With Hawks or equivalent adapter fully extended, its MFD will become 0.40m,
of course on some mirror-less cameras.