William Royer wrote:
Additional comment: For a little aid in manual focusing -- whether with this lens or other manual focus -- one might try the Nikon magnifying eyepiece (DK-17M, I think). It gives a slight, not huge, magnification.
I was interested in some older prime AIs Nikon manual focus lenses in the past, I desired a 100/135mm. EBay sold them, but a lot of them said they had dust and fungus. That always scared me off. Those old lenses are quality, if you can find a good one that works OK.