The idea was to put one of those immensely expensive Fuji ENG-style PL zooms on one, and see how it worked out. I'd have liked to have the improved gauge of how well it worked that you'd get from a raw image, but I'm not sure it's possible to do it. Oh well. Not a dealbreaker.
There are smaller-sensor Canons that will do raw (the 50D will, but that's an obscure old thing now), and I find that the 60D will too, but I'm not aware if there are any decent PL conversions of those particular cameras. There are also easily demountable PL adaptors that have glass in them to correct the FFD offset, but it wouldn't really be fair to try and test someone's lens out with that confounding factor involved.