Canon FD FDn 50mm f1.4 newFD 50/1,4 50/1.4

Clear Glass
Smooth Focus
All F-Stop aperture clicks
No oil leak on blades
Lens Caps included

some surface dust easily blown away

NOW The NOT Perfect :
The chrome Push Button on the side to attach onto Camera / Adapter/ Rear lens cap
Make sure when you attach to camera/adapter
that you twist tight when past half way turn give little nudge a little more than usual swift reaching the end and hard then the button pops back up which then all Aperture f-stop will work flawless

If button is still pressed in means it has not locked onto camera and or adapter
thus it will not wide open. So just counter clock wise half way turn and make the twist clock wise sudden fast and with little nudge and button will just pop up that means the lens is locked and all aperture clicks will work

As you can see in pic 5 circled in red

(The 3 prongs in the back of the rear lens are what enables the aperture blades also allowing rear lens caps to be attached and detached)

With adapter it works flawless with your mirrorless system