The IB/E HDx35 Mark II, HDx2 Mark II, and PLx2 2x Extender have PL lens mounts which can be split into two sections, leaving a neutral mount attached. Back-focus is set on the fixed neutral mount on the lens, so no adjustment is necessary when switching to a new mount, which are precision machined from stainless steel. The UMS adapters attach to the neutral mount left on the lens, so switching mounts is as easy as changing lenses on a camera. Available mounts are PL, Canon EF, Nikon F, Micro Four Thirds, and Sony E.
Please note: The PLx2 works with all UMS adapters with the exception of the Nikon F mount.