[conurus]

Originally Posted by johnastovall

"The L1's 4/3 system flange-to-focal plane distance is 38.67mm.." The EOS is 44mm.

So we are looking at 5.33mm adapter.

The thickness of the EF mount bayonets is 5.5mm, putting the end of an EF lens at 38.5mm from the sensor plane. The EF mount is of a larger diameter than 4/3 so the bayonet cannot fit inside 4/3's mount throat. That rules out any possibility of an adapter for EF lens to 4/3 camera.