I've had John do a lens, been a while, came out nice.

Many of the older lenes have a better feel on the focus ring than the later ones, AI vs say AF-D.

The AF-D 50 1.8 is a great lens though and if your ability to focus is degrading like my ability to focus AF is going to be a future step.

The other advantage of the AF is the resale value, it may cost a $115 but you could sell it for very close to that, done it 3 times now I think with that 50 1.8 AF-D for various reasons.