Excellent++ Canon FD 20mm F/2.8 wide angle MF with custom CINE focus ring!
Focus is smooth, aperture is snappy, aftermarket front cap and original canon back cap, and a custom cinema focus ring for a follow focus!
The focus ring can be removed if necessary, but it was professionally custom fitted and created for this specific lens.
I used this with my Sony A7s to shoot a few films. Beautiful glass. This is a wide, sharp lens!
You probably won't find a nicer version of this lens.