snegron wrote in post #17670311
I wonder how well EF or EF-S lenses work on m4/3 bodies though?
They should work fairly well when used with "smart" adapters that have electronics which allow setting the aperture. These adapters can get very pricey.
With "dumb" adapters that are little more than a ring that mounts the lens on one side and mounts to the camera's mount on the other, you have to set the aperture on a Canon body then hold the depth of field prevue button in while you "unlock and twist" to start removing the lens. The aperture remains where you set it on the Canon body and cannot be changed on a m4/3 body. It must be returned to the Canon body for any changes.
snegron wrote in post #17670311
With my current Nikon set up I prefer using older manual focus lenses than AF lenses because of the stiffer focusing rings. Would the same hold true between FD and EOS lenses?
Yes. On modern AF lenses the focusing ring does not drive the lens elements focusing movement directly. It sends an electronic signal that activates the focusing motor so that is why you have no "tactile feel". Often referred to as "focus by wire". You just don't get any tactile feedback.
While I've pretty much adapted to this myself, I do have a few Nikkor lenses from the Nikon F era I use on my m4/3 cameras and still like the smooth positive feel of the focusing on those.
I didn't seriously consider using my Canon lenses on my m4/3 bodies, my main reason for making the change was to get into lighter gear. Some of the Canon lenses I had were a bit heavy and when I turned 75 I felt it was time to "lighten the load", so I sold all my Canon stuff.