Birger will not be alone on this land, c’est l’ami Philippo Church friendly Italian cinematographer encountered during the trip to Osaka, which gave me the info. Kipon therefore proposes adapter rings that are a bit all over the box <=> view but one that particularly interests me is the one that allows you to mount Canon EF lenses on micro enclosures 4/3.
For now you can buy them on the bay
How have they managed this feat since unlike other brands, Canon lenses have no mechanical control of the diaphragm ?
Simple, had to think looks like the other, f-stop is the default open 100% they just had to add one in the ring !