Since the sensor size of the Black Magic Cinema (15,8X8,8) camera and Nikon 1 (13,2X8,8) are almost identical, I wonder if exist an adaptor for these lenses for the MFT mount?

Nikon 1 have shorter flange distance then BMCC MFT iirc so it will not work.

Not only that, but the 18.5mm f/1.8 and the 10mm f/2.8 IIRC don't have any physical controls. No focus ring, no aperture ring. Nothing.