Cheers Mike and Greg.
I was only wondering as some adaptors for old MF lenses(M42 screw mount etc) have AF confirm chips on them, these chips mimic the electronics in Canon lenses so that while manually focusing your favourite 1960's lens (
) you will still get a 'beep' and flashing focus points thru the viewfinder. The focus sensors are in the body ofcourse, not the lens.
Thought Samyang may have incorporated something like this in their lenses.