he is currently conducting a test, so we'll know soon (if he does it correctly)...
Well, the optical properties of the lens have been significantly altered, the
back focus is now around 90-110mm sellers reports,
so I guess some lens element(s) have been inserted. This also means, that
- no sharp image can be projected to a standard camera sensor as is.
- parfocaility UV-VIS-NIR has been destroyed, as most likely simple quartz lenses have been used for that (as this Sirchie RUVIS system was fur UV only)
Looking at the patent data (thanks Anfdrea!), this assumption seems to be valid, as the use of a mirror beam splitter demands a much longer optical path for that.