Hi Emmanuel,
Thank you for the update.
My real concern is focus through the prism (the infamous Bolex prism factor). As I understand it any lens will give acceptable focus stopped down past f3.2 or so. Going any wider without a preset-RX lens (like the RX c-mounts) will give you soft images.
Does the PL adapter correct this? How was focus wide open?
Cheers,
AY